81213078998862790

Names of 81213078998862790

• Cardinal: 81213078998862790 can be written as Eighty-one quadrillion, two hundred thirteen trillion, seventy-eight billion, nine hundred ninety-eight million, eight hundred sixty-two thousand, seven hundred ninety.

Scientific notation

• Scientific notation: 8.121307899886279 × 10¹⁶

Factors of 81213078998862790

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 5
• Sum of prime factors: 848710200972

Divisors of 81213078998862790

• Number of divisors d(n): 32
• Complete list of divisors:
  1 2 5 7 10 14 35 70 1367 2734 6835 9569 13670 19138 47845 95690 848710199591 1697420399182 4243550997955 5940971397137 8487101995910 11881942794274 29704856985685 59409713971370 1160186842840897 2320373685681794 5800934214204485 8121307899886279 11601868428408970 16242615799772558 40606539499431395 81213078998862790
• Sum of all divisors σ(n): 167189119638027264
• Sum of proper divisors (its aliquot sum) s(n): 85976040639164474
• 81213078998862790 is an abundant number, because the sum of its proper divisors (85976040639164474) is greater than itself. Its abundance is 4762961640301684

Bases of 81213078998862790

• Binary: 100100000100001101101110101110100110101111100101111000110₂
• Hexadecimal: 0x12086DD74D7CBC6
• Base-36: M7NMTFSD0HY

Squares and roots of 81213078998862790

• 81213078998862790 squared (81213078998862790²) is 6595564200475528348862113246584100
• 81213078998862790 cubed (81213078998862790³) is 535646076455290379798455587608171509638752095639000
• The square root of 81213078998862790 is 284979085.1954977941
• The cube root of 81213078998862790 is 433053.9377768763

Scales and comparisons

• 81,213,078,998,862,790 seconds is equal to 2,582,324,703 years, 32 weeks, 11 hours, 13 minutes, 10 seconds.
• To count from 1 to 81,213,078,998,862,790 would take you about seven billion, seven hundred forty-six million, nine hundred seventy-four thousand, one 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 81213078998862790 cubic inches would be around 36087.8 feet tall.

Recreational maths with 81213078998862790

• 81213078998862790 backwards is 09726889987031218
• The number of decimal digits it has is: 17
• The sum of 81213078998862790's digits is 88
• More coming soon!