81623912013

Names of 81623912013

• Cardinal: 81623912013 can be written as Eighty-one billion, six hundred twenty-three million, nine hundred twelve thousand and thirteen.

Scientific notation

• Scientific notation: 8.1623912013 × 10¹⁰

Factors of 81623912013

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 473

Divisors of 81623912013

• Number of divisors d(n): 192
• Complete list of divisors:
  1 3 7 9 17 21 47 51 63 73 97 119 141 153 219 229 291 329 357 423 511 657 679 687 799 873 987 1071 1241 1533 1603 1649 2037 2061 2397 2961 3431 3723 3893 4559 4599 4809 4947 5593 6111 7081 7191 8687 10293 10763 11169 11543 11679 13677 14427 14841 16717 16779 21243 22213 24017 26061 27251 30879 31913 32289 34629 35037 41031 49567 50151 50337 58327 63729 66639 72051 75341 77503 78183 81753 95739 96867 103887 117019 120377 148701 150453 155491 174981 182971 199917 216153 226023 232509 245259 284189 287217 332807 351057 361131 377621 408289 446103 466473 524943 542521 548913 678069 697527 785699 842639 852567 998421 1044011 1053171 1083393 1132863 1224867 1280797 1399419 1621549 1627563 1646739 1989323 2329649 2357097 2527917 2557701 2643347 2995263 3132033 3398589 3674601 3842391 4864647 4882689 5499893 5657719 5967969 6988947 7071291 7308077 7583751 7930041 9396099 11350843 11527173 13356883 14593941 16499679 16973157 17748187 17903907 20966841 21924231 23790123 27566333 34052529 39604033 40070649 49499037 50919471 53244561 65772693 76212803 82698999 93498181 102157587 118812099 120211947 124237309 159733683 192964331 228638409 248096997 280494543 356436297 372711927 533489621 578892993 685915227 841483629 1118135781 1295617651 1600468863 1736678979 3886852953 4801406589 9069323557 11660558859 27207970671 81623912013
• Sum of all divisors σ(n): 149876213760
• Sum of proper divisors (its aliquot sum) s(n): 68252301747
• 81623912013 is a deficient number, because the sum of its proper divisors (68252301747) is less than itself. Its deficiency is 13371610266

Bases of 81623912013

• Binary: 1001100000001001010100000111001001101₂
• Hexadecimal: 0x13012A0E4D
• Base-36: 11HWRPL9

Squares and roots of 81623912013

• 81623912013 squared (81623912013²) is 6662463012305965712169
• 81623912013 cubed (81623912013³) is 543816294706329081525077339386197
• The square root of 81623912013 is 285698.9884703829
• The cube root of 81623912013 is 4337.8294060145

Scales and comparisons

• 81,623,912,013 seconds is equal to 2,595 years, 20 weeks, 1 day, 4 hours, 53 minutes, 33 seconds.
• To count from 1 to 81,623,912,013 would take you about five thousand, one hundred ninety 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 81623912013 cubic inches would be around 361.5 feet tall.

Recreational maths with 81623912013

• 81623912013 backwards is 31021932618
• The number of decimal digits it has is: 11
• The sum of 81623912013's digits is 36
• More coming soon!