81940535472

Names of 81940535472

• Cardinal: 81940535472 can be written as Eighty-one billion, nine hundred forty million, five hundred thirty-five thousand, four hundred seventy-two.

Scientific notation

• Scientific notation: 8.1940535472 × 10¹⁰

Factors of 81940535472

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 607

Divisors of 81940535472

• Number of divisors d(n): 90
• Complete list of divisors:
  1 2 3 4 6 8 12 16 24 48 79 158 237 316 474 523 632 948 1046 1264 1569 1896 2092 3138 3792 4184 6241 6276 8368 12482 12552 18723 24964 25104 37446 41317 49928 74892 82634 99856 123951 149784 165268 247902 273529 299568 330536 495804 547058 661072 820587 991608 1094116 1641174 1983216 2188232 3264043 3282348 4376464 6528086 6564696 9792129 13056172 13129392 19584258 21608791 26112344 39168516 43217582 52224688 64826373 78337032 86435164 129652746 156674064 172870328 259305492 345740656 518610984 1037221968 1707094489 3414188978 5121283467 6828377956 10242566934 13656755912 20485133868 27313511824 40970267736 81940535472
• Sum of all divisors σ(n): 214803837612
• Sum of proper divisors (its aliquot sum) s(n): 132863302140
• 81940535472 is an abundant number, because the sum of its proper divisors (132863302140) is greater than itself. Its abundance is 50922766668

Bases of 81940535472

• Binary: 1001100010100000010010101100010110000₂
• Hexadecimal: 0x13140958B0
• Base-36: 11N5A1TC

Squares and roots of 81940535472

• 81940535472 squared (81940535472²) is 6714251353438090262784
• 81940535472 cubed (81940535472³) is 550169351194317844333590153474048
• The square root of 81940535472 is 286252.5728652933
• The cube root of 81940535472 is 4343.4310588817

Scales and comparisons

• 81,940,535,472 seconds is equal to 2,605 years, 23 weeks, 4 days, 19 hours, 51 minutes, 12 seconds.
• To count from 1 to 81,940,535,472 would take you about five thousand, two hundred ten 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 81940535472 cubic inches would be around 362 feet tall.

Recreational maths with 81940535472

• 81940535472 backwards is 27453504918
• 81940535472 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81940535472's digits is 48
• More coming soon!