821942361178316161

Names of 821942361178316161

• Cardinal: 821942361178316161 can be written as Eight hundred twenty-one quadrillion, nine hundred forty-two trillion, three hundred sixty-one billion, one hundred seventy-eight million, three hundred sixteen thousand, one hundred sixty-one.

Scientific notation

• Scientific notation: 8.21942361178316161 × 10¹⁷

Factors of 821942361178316161

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 651039

Divisors of 821942361178316161

• Number of divisors d(n): 27
• Complete list of divisors:
  1 7 49 199 1393 9751 39601 277207 650833 1940449 4555831 31890817 129515767 906610369 6346272583 25773637633 180415463431 423583593889 1262908244017 2965085157223 20755596100561 84293135183911 590051946287377 4130363624011639 16774333901598289 117420337311188023 821942361178316161
• Sum of all divisors σ(n): 960967361880547011
• Sum of proper divisors (its aliquot sum) s(n): 139025000702230850
• 821942361178316161 is a deficient number, because the sum of its proper divisors (139025000702230850) is less than itself. Its deficiency is 682917360476085311

Bases of 821942361178316161

• Binary: 101101101000001000000011100011111111111000010001110110000001₂
• Hexadecimal: 0xB682038FFE11D81
• Base-36: 68T68ZYQOZUP

Squares and roots of 821942361178316161

• 821942361178316161 squared (821942361178316161²) is 675589245099385533785388895273777921
• 821942361178316161 cubed (821942361178316161³) is 555295419303665105887818307728057111473662603839281281
• 821942361178316161 is a perfect square number. Its square root is 906610369
• The cube root of 821942361178316161 is 936728.6165270809

Scales and comparisons

• 821,942,361,178,316,161 seconds is equal to 26,135,224,650 years, 42 weeks, 3 days, 4 hours, 16 minutes, 1 second.
• To count from 1 to 821,942,361,178,316,161 would take you about seventy-eight billion, four hundred five million, six hundred seventy-three thousand, nine hundred fifty-two 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 821942361178316161 cubic inches would be around 78060.7 feet tall.

Recreational maths with 821942361178316161

• 821942361178316161 backwards is 161613871163249128
• The number of decimal digits it has is: 18
• The sum of 821942361178316161's digits is 70
• More coming soon!