12987479817

Names of 12987479817

• Cardinal: 12987479817 can be written as Twelve billion, nine hundred eighty-seven million, four hundred seventy-nine thousand, eight hundred seventeen.

Scientific notation

• Scientific notation: 1.2987479817 × 10¹⁰

Factors of 12987479817

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 86

Divisors of 12987479817

• Number of divisors d(n): 144
• Complete list of divisors:
  1 3 9 13 17 27 39 51 53 81 117 153 159 169 221 243 351 459 477 507 663 689 729 901 1053 1377 1431 1521 1989 2067 2187 2197 2703 2873 3159 4131 4293 4563 5967 6201 6561 6591 8109 8619 8957 9477 11713 12393 12879 13689 17901 18603 19773 24327 25857 26871 28431 35139 37179 37349 38637 41067 53703 55809 59319 72981 77571 80613 85293 105417 111537 112047 115911 116441 123201 152269 161109 167427 177957 218943 232713 241839 316251 336141 347733 349323 369603 456807 483327 502281 533871 656829 698139 725517 948753 1008423 1047969 1108809 1370421 1449981 1506843 1601613 1970487 1979497 2094417 2176551 2846259 3025269 3143907 4111263 4520529 4804839 5911461 5938491 6283251 6529653 8538777 9075807 9431721 12333789 14414517 17815473 18849753 19588959 25616331 27227421 28295163 37001367 53446419 58766877 76848993 81682263 84885489 111004101 160339257 245046789 254656467 333012303 481017771 763969401 999036909 1443053313 4329159939 12987479817
• Sum of all divisors σ(n): 22765775760
• Sum of proper divisors (its aliquot sum) s(n): 9778295943
• 12987479817 is a deficient number, because the sum of its proper divisors (9778295943) is less than itself. Its deficiency is 3209183874

Bases of 12987479817

• Binary: 1100000110000111010011011100001001₂
• Hexadecimal: 0x3061D3709
• Base-36: 5YSERK9

Squares and roots of 12987479817

• 12987479817 squared (12987479817²) is 168674631996982353489
• 12987479817 cubed (12987479817³) is 2190658378700710720843547031513
• The square root of 12987479817 is 113962.6246494879
• The cube root of 12987479817 is 2350.5795955029

Scales and comparisons

• 12,987,479,817 seconds is equal to 412 years, 50 weeks, 1 hour, 16 minutes, 57 seconds.
• To count from 1 to 12,987,479,817 would take you about eight hundred twenty-five years!

  This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)

• A cube with a volume of 12987479817 cubic inches would be around 195.9 feet tall.

Recreational maths with 12987479817

• 12987479817 backwards is 71897478921
• The number of decimal digits it has is: 11
• The sum of 12987479817's digits is 63
• More coming soon!