821275945489021971

Names of 821275945489021971

• Cardinal: 821275945489021971 can be written as Eight hundred twenty-one quadrillion, two hundred seventy-five trillion, nine hundred forty-five billion, four hundred eighty-nine million, twenty-one thousand, nine hundred seventy-one.

Scientific notation

• Scientific notation: 8.21275945489021971 × 10¹⁷

Factors of 821275945489021971

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 5164292

Divisors of 821275945489021971

• Number of divisors d(n): 64
• Complete list of divisors:
  1 3 13 31 39 93 403 1209 1567 4701 20371 48577 61113 85381 145731 256143 631501 1109953 1894503 2646811 3329859 5077297 7940433 15231891 34408543 66004861 103225629 133792027 157396207 198014583 401376081 472188621 1739296351 2046150691 4147552837 5217889053 6138452073 7956124399 12442658511 23868373197 53918186881 103429617187 161754560643 246639856369 310288851561 433504695157 739919569107 1300514085471 3206318132797 5635561037041 9618954398391 13438645549867 16906683111123 40315936649601 174702392148271 524107176444813 679301857311019 2037905571933057 8830924145043247 21058357576641589 26492772435129741 63175072729924767 273758648496340657 821275945489021971
• Sum of all divisors σ(n): 1218100275099631616
• Sum of proper divisors (its aliquot sum) s(n): 396824329610609645
• 821275945489021971 is a deficient number, because the sum of its proper divisors (396824329610609645) is less than itself. Its deficiency is 424451615878412326

Bases of 821275945489021971

• Binary: 101101100101110000100001111100000001011100100011110000010011₂
• Hexadecimal: 0xB65C21F01723C13
• Base-36: 68MM0WTNMQS3

Squares and roots of 821275945489021971

• 821275945489021971 squared (821275945489021971²) is 674494178638886987956717678120724841
• 821275945489021971 cubed (821275945489021971³) is 553945844288493197448371542293651459522390182694481611
• The square root of 821275945489021971 is 906242762.9995298181
• The cube root of 821275945489021971 is 936475.3873216889

Scales and comparisons

• 821,275,945,489,021,971 seconds is equal to 26,114,034,693 years, 13 weeks, 2 days, 3 hours, 52 minutes, 51 seconds.
• To count from 1 to 821,275,945,489,021,971 would take you about seventy-eight billion, three hundred forty-two million, one hundred four thousand and seventy-nine 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 821275945489021971 cubic inches would be around 78039.6 feet tall.

Recreational maths with 821275945489021971

• 821275945489021971 backwards is 179120984549572128
• The number of decimal digits it has is: 18
• The sum of 821275945489021971's digits is 84
• More coming soon!