81977372672

Names of 81977372672

• Cardinal: 81977372672 can be written as Eighty-one billion, nine hundred seventy-seven million, three hundred seventy-two thousand, six hundred seventy-two.

Scientific notation

• Scientific notation: 8.1977372672 × 10¹⁰

Factors of 81977372672

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 15
• Sum of prime factors: 2499

Divisors of 81977372672

• Number of divisors d(n): 104
• Complete list of divisors:
  1 2 4 8 13 16 26 32 52 64 104 128 208 256 416 512 832 1024 1187 1297 1664 2048 2374 2594 3328 4096 4748 5188 6656 9496 10376 13312 15431 16861 18992 20752 26624 30862 33722 37984 41504 53248 61724 67444 75968 83008 123448 134888 151936 166016 246896 269776 303872 332032 493792 539552 607744 664064 987584 1079104 1215488 1328128 1539539 1975168 2158208 2430976 2656256 3079078 3950336 4316416 4861952 5312512 6158156 7900672 8632832 12316312 15801344 17265664 20014007 24632624 31602688 34531328 40028014 49265248 63205376 69062656 80056028 98530496 160112056 197060992 320224112 394121984 640448224 788243968 1280896448 1576487936 2561792896 3152975872 5123585792 6305951744 10247171584 20494343168 40988686336 81977372672
• Sum of all divisors σ(n): 176830060176
• Sum of proper divisors (its aliquot sum) s(n): 94852687504
• 81977372672 is an abundant number, because the sum of its proper divisors (94852687504) is greater than itself. Its abundance is 12875314832

Bases of 81977372672

• Binary: 1001100010110001110110111000000000000₂
• Hexadecimal: 0x13163B7000
• Base-36: 11NR7LKW

Squares and roots of 81977372672

• 81977372672 squared (81977372672²) is 6720289630203972419584
• 81977372672 cubed (81977372672³) is 550911687479008114415047119208448
• The square root of 81977372672 is 286316.9095111219
• The cube root of 81977372672 is 4344.0818392197

Scales and comparisons

• 81,977,372,672 seconds is equal to 2,606 years, 32 weeks, 4 days, 4 hours, 24 minutes, 32 seconds.
• To count from 1 to 81,977,372,672 would take you about five thousand, two hundred thirteen 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 81977372672 cubic inches would be around 362 feet tall.

Recreational maths with 81977372672

• 81977372672 backwards is 27627377918
• The number of decimal digits it has is: 11
• The sum of 81977372672's digits is 59
• More coming soon!