81627717864

Names of 81627717864

• Cardinal: 81627717864 can be written as Eighty-one billion, six hundred twenty-seven million, seven hundred seventeen thousand, eight hundred sixty-four.

Scientific notation

• Scientific notation: 8.1627717864 × 10¹⁰

Factors of 81627717864

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 44170866

Divisors of 81627717864

• Number of divisors d(n): 64
• Complete list of divisors:
  1 2 3 4 6 7 8 11 12 14 21 22 24 28 33 42 44 56 66 77 84 88 132 154 168 231 264 308 462 616 924 1848 44170843 88341686 132512529 176683372 265025058 309195901 353366744 485879273 530050116 618391802 927587703 971758546 1060100232 1236783604 1457637819 1855175406 1943517092 2473567208 2915275638 3401154911 3710350812 3887034184 5830551276 6802309822 7420701624 10203464733 11661102552 13604619644 20406929466 27209239288 40813858932 81627717864
• Sum of all divisors σ(n): 254424061440
• Sum of proper divisors (its aliquot sum) s(n): 172796343576
• 81627717864 is an abundant number, because the sum of its proper divisors (172796343576) is greater than itself. Its abundance is 91168625712

Bases of 81627717864

• Binary: 1001100000001011001000010000011101000₂
• Hexadecimal: 0x13016420E8
• Base-36: 11HZ1A7C

Squares and roots of 81627717864

• 81627717864 squared (81627717864²) is 6663084323684784722496
• 81627717864 cubed (81627717864³) is 543892367277782860197481021868544
• The square root of 81627717864 is 285705.6489886053
• The cube root of 81627717864 is 4337.8968244763

Scales and comparisons

• 81,627,717,864 seconds is equal to 2,595 years, 26 weeks, 3 days, 6 hours, 4 minutes, 24 seconds.
• To count from 1 to 81,627,717,864 would take you about five thousand, one hundred ninety-one 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 81627717864 cubic inches would be around 361.5 feet tall.

Recreational maths with 81627717864

• 81627717864 backwards is 46871772618
• The number of decimal digits it has is: 11
• The sum of 81627717864's digits is 57
• More coming soon!