Convert 444 561 713 799 161 to a Signed Binary in One's (1's) Complement Representation

How to convert decimal number 444 561 713 799 161(10) to a signed binary in one's (1's) complement representation

What are the steps to convert decimal number
444 561 713 799 161 to a signed binary in one's (1's) complement representation?

  • A signed integer, written in base ten, or a decimal system number, is a number written using the digits 0 through 9 and the sign, which can be positive (+) or negative (-). If positive, the sign is usually not written. A number written in base two, or binary, is a number written using only the digits 0 and 1.

1. Divide the number repeatedly by 2:

Keep track of each remainder.

Stop when you get a quotient that is equal to zero.


  • division = quotient + remainder;
  • 444 561 713 799 161 ÷ 2 = 222 280 856 899 580 + 1;
  • 222 280 856 899 580 ÷ 2 = 111 140 428 449 790 + 0;
  • 111 140 428 449 790 ÷ 2 = 55 570 214 224 895 + 0;
  • 55 570 214 224 895 ÷ 2 = 27 785 107 112 447 + 1;
  • 27 785 107 112 447 ÷ 2 = 13 892 553 556 223 + 1;
  • 13 892 553 556 223 ÷ 2 = 6 946 276 778 111 + 1;
  • 6 946 276 778 111 ÷ 2 = 3 473 138 389 055 + 1;
  • 3 473 138 389 055 ÷ 2 = 1 736 569 194 527 + 1;
  • 1 736 569 194 527 ÷ 2 = 868 284 597 263 + 1;
  • 868 284 597 263 ÷ 2 = 434 142 298 631 + 1;
  • 434 142 298 631 ÷ 2 = 217 071 149 315 + 1;
  • 217 071 149 315 ÷ 2 = 108 535 574 657 + 1;
  • 108 535 574 657 ÷ 2 = 54 267 787 328 + 1;
  • 54 267 787 328 ÷ 2 = 27 133 893 664 + 0;
  • 27 133 893 664 ÷ 2 = 13 566 946 832 + 0;
  • 13 566 946 832 ÷ 2 = 6 783 473 416 + 0;
  • 6 783 473 416 ÷ 2 = 3 391 736 708 + 0;
  • 3 391 736 708 ÷ 2 = 1 695 868 354 + 0;
  • 1 695 868 354 ÷ 2 = 847 934 177 + 0;
  • 847 934 177 ÷ 2 = 423 967 088 + 1;
  • 423 967 088 ÷ 2 = 211 983 544 + 0;
  • 211 983 544 ÷ 2 = 105 991 772 + 0;
  • 105 991 772 ÷ 2 = 52 995 886 + 0;
  • 52 995 886 ÷ 2 = 26 497 943 + 0;
  • 26 497 943 ÷ 2 = 13 248 971 + 1;
  • 13 248 971 ÷ 2 = 6 624 485 + 1;
  • 6 624 485 ÷ 2 = 3 312 242 + 1;
  • 3 312 242 ÷ 2 = 1 656 121 + 0;
  • 1 656 121 ÷ 2 = 828 060 + 1;
  • 828 060 ÷ 2 = 414 030 + 0;
  • 414 030 ÷ 2 = 207 015 + 0;
  • 207 015 ÷ 2 = 103 507 + 1;
  • 103 507 ÷ 2 = 51 753 + 1;
  • 51 753 ÷ 2 = 25 876 + 1;
  • 25 876 ÷ 2 = 12 938 + 0;
  • 12 938 ÷ 2 = 6 469 + 0;
  • 6 469 ÷ 2 = 3 234 + 1;
  • 3 234 ÷ 2 = 1 617 + 0;
  • 1 617 ÷ 2 = 808 + 1;
  • 808 ÷ 2 = 404 + 0;
  • 404 ÷ 2 = 202 + 0;
  • 202 ÷ 2 = 101 + 0;
  • 101 ÷ 2 = 50 + 1;
  • 50 ÷ 2 = 25 + 0;
  • 25 ÷ 2 = 12 + 1;
  • 12 ÷ 2 = 6 + 0;
  • 6 ÷ 2 = 3 + 0;
  • 3 ÷ 2 = 1 + 1;
  • 1 ÷ 2 = 0 + 1;

2. Construct the base 2 representation of the positive number:

Take all the remainders starting from the bottom of the list constructed above.

444 561 713 799 161(10) = 1 1001 0100 0101 0011 1001 0111 0000 1000 0001 1111 1111 1001(2)

3. Determine the signed binary number bit length:

  • The base 2 number's actual length, in bits: 49.

  • A signed binary's bit length must be equal to a power of 2, as of:
  • 21 = 2; 22 = 4; 23 = 8; 24 = 16; 25 = 32; 26 = 64; ...
  • The first bit (the leftmost) indicates the sign:
  • 0 = positive integer number, 1 = negative integer number

The least number that is:

1) a power of 2

2) and is larger than the actual length, 49,

3) so that the first bit (leftmost) could be zero
(we deal with a positive number at this moment)

=== is: 64.


4. Get the positive binary computer representation on 64 bits (8 Bytes):

If needed, add extra 0s in front (to the left) of the base 2 number, up to the required length, 64.


Decimal Number 444 561 713 799 161(10) converted to signed binary in one's complement representation:

444 561 713 799 161(10) = 0000 0000 0000 0001 1001 0100 0101 0011 1001 0111 0000 1000 0001 1111 1111 1001

Spaces were used to group digits: for binary, by 4, for decimal, by 3.

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How to convert signed integers from the decimal system to signed binary in one's complement representation

Follow the steps below to convert a signed base 10 integer number to signed binary in one's complement representation:

  • 1. If the number to be converted is negative, start with the positive version of the number.
  • 2. Divide repeatedly by 2 the positive representation of the integer number that is to be converted to binary, keeping track of each remainder, until we get a quotient that is equal to ZERO.
  • 3. Construct the base 2 representation of the positive number, by taking all the remainders starting from the bottom of the list constructed above. Thus, the last remainder of the divisions becomes the first symbol (the leftmost) of the base two number, while the first remainder becomes the last symbol (the rightmost).
  • 4. Binary numbers represented in computer language must have 4, 8, 16, 32, 64, ... bit length (a power of 2) - if needed, fill in '0' bits in front (to the left) of the base 2 number calculated above, up to the right length; this way the first bit (leftmost) will always be '0', correctly representing a positive number.
  • 5. To get the negative integer number representation in signed binary one's complement, replace all '0' bits with '1's and all '1' bits with '0's.

Example: convert the negative number -49 from the decimal system (base ten) to signed binary one's complement:

  • 1. Start with the positive version of the number: |-49| = 49
  • 2. Divide repeatedly 49 by 2, keeping track of each remainder:
    • division = quotient + remainder
    • 49 ÷ 2 = 24 + 1
    • 24 ÷ 2 = 12 + 0
    • 12 ÷ 2 = 6 + 0
    • 6 ÷ 2 = 3 + 0
    • 3 ÷ 2 = 1 + 1
    • 1 ÷ 2 = 0 + 1
  • 3. Construct the base 2 representation of the positive number, by taking all the remainders starting from the bottom of the list constructed above:
    49(10) = 11 0001(2)
  • 4. The actual bit length of base 2 representation is 6, so the positive binary computer representation of a signed binary will take in this case 8 bits (the least power of 2 that is larger than 6) - add '0's in front of the base 2 number, up to the required length:
    49(10) = 0011 0001(2)
  • 5. To get the negative integer number representation in signed binary one's complement, replace all '0' bits with '1's and all '1' bits with '0's:
    -49(10) = 1100 1110
  • Number -49(10), signed integer, converted from the decimal system (base 10) to signed binary in one's complement representation = 1100 1110