81976921272

Names of 81976921272

• Cardinal: 81976921272 can be written as Eighty-one billion, nine hundred seventy-six million, nine hundred twenty-one thousand, two hundred seventy-two.

Scientific notation

• Scientific notation: 8.1976921272 × 10¹⁰

Factors of 81976921272

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 28955

Divisors of 81976921272

• Number of divisors d(n): 72
• Complete list of divisors:
  1 2 3 4 6 8 9 12 18 24 36 72 199 398 597 796 1194 1592 1791 2388 3582 4776 7164 14328 28751 39601 57502 79202 86253 115004 118803 158404 172506 230008 237606 258759 316808 345012 356409 475212 517518 690024 712818 950424 1035036 1425636 2070072 2851272 5721449 11442898 17164347 22885796 34328694 45771592 51493041 68657388 102986082 137314776 205972164 411944328 1138568351 2277136702 3415705053 4554273404 6831410106 9108546808 10247115159 13662820212 20494230318 27325640424 40988460636 81976921272
• Sum of all divisors σ(n): 223149878640
• Sum of proper divisors (its aliquot sum) s(n): 141172957368
• 81976921272 is an abundant number, because the sum of its proper divisors (141172957368) is greater than itself. Its abundance is 59196036096

Bases of 81976921272

• Binary: 1001100010110001101001000110010111000₂
• Hexadecimal: 0x1316348CB8
• Base-36: 11NQXXA0

Squares and roots of 81976921272

• 81976921272 squared (81976921272²) is 6720215621235686097984
• 81976921272 cubed (81976921272³) is 550902586912902410611339245915648
• The square root of 81976921272 is 286316.1212226793
• The cube root of 81976921272 is 4344.0738657911

Scales and comparisons

• 81,976,921,272 seconds is equal to 2,606 years, 31 weeks, 5 days, 23 hours, 1 minute, 12 seconds.
• To count from 1 to 81,976,921,272 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 81976921272 cubic inches would be around 362 feet tall.

Recreational maths with 81976921272

• 81976921272 backwards is 27212967918
• The number of decimal digits it has is: 11
• The sum of 81976921272's digits is 54
• More coming soon!