81278476013

Names of 81278476013

• Cardinal: 81278476013 can be written as Eighty-one billion, two hundred seventy-eight million, four hundred seventy-six thousand and thirteen.

Scientific notation

• Scientific notation: 8.1278476013 × 10¹⁰

Factors of 81278476013

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 424

Divisors of 81278476013

• Number of divisors d(n): 96
• Complete list of divisors:
  1 7 19 31 61 73 133 217 233 361 427 511 589 1159 1387 1631 1891 2263 2527 4123 4427 4453 7223 8113 9709 11191 13237 14213 15841 17009 22021 26353 30989 31171 35929 42997 50561 78337 84113 84607 99491 119063 137237 138043 154147 184471 251503 270047 300979 323171 440603 527279 588791 592249 682651 816943 960659 966301 1037549 1607533 1890329 2262197 2607503 2622817 3084221 3690953 4778557 5130893 5718601 6140249 7262843 8371457 10018301 11252731 18252521 18359719 19713431 32164019 35916251 42981743 49833523 58600199 70128107 137994017 159057683 190347719 225148133 348834661 374555189 611116361 1113403781 1332434033 2621886323 4277814527 11611210859 81278476013
• Sum of all divisors σ(n): 104713869312
• Sum of proper divisors (its aliquot sum) s(n): 23435393299
• 81278476013 is a deficient number, because the sum of its proper divisors (23435393299) is less than itself. Its deficiency is 57843082714

Bases of 81278476013

• Binary: 1001011101100100100110001111011101101₂
• Hexadecimal: 0x12EC931EED
• Base-36: 11C73TGT

Squares and roots of 81278476013

• 81278476013 squared (81278476013²) is 6606190662995816376169
• 81278476013 cubed (81278476013³) is 536941109339610028049804651334197
• The square root of 81278476013 is 285093.8021301059
• The cube root of 81278476013 is 4331.7014580865

Scales and comparisons

• 81,278,476,013 seconds is equal to 2,584 years, 21 weeks, 2 hours, 26 minutes, 53 seconds.
• To count from 1 to 81,278,476,013 would take you about five thousand, one hundred sixty-eight 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 81278476013 cubic inches would be around 361 feet tall.

Recreational maths with 81278476013

• 81278476013 backwards is 31067487218
• The number of decimal digits it has is: 11
• The sum of 81278476013's digits is 47
• More coming soon!