81327853311628221

Names of 81327853311628221

• Cardinal: 81327853311628221 can be written as Eighty-one quadrillion, three hundred twenty-seven trillion, eight hundred fifty-three billion, three hundred eleven million, six hundred twenty-eight thousand, two hundred twenty-one.

Scientific notation

• Scientific notation: 8.1327853311628221 × 10¹⁶

Factors of 81327853311628221

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 4924283

Divisors of 81327853311628221

• Number of divisors d(n): 48
• Complete list of divisors:
  1 3 9 19 57 171 227 681 2043 4313 12939 38817 470443 1411329 4233987 4453591 8938417 13360773 26815251 40082319 80445753 84618229 106790561 253854687 320371683 761564061 961115049 1010965157 2029020659 3032895471 6087061977 9098686413 18261185931 19208337983 57625013949 172875041847 2095160710813 6285482132439 18856446397317 39808053505447 119424160516341 358272481549023 475601481354551 1426804444063653 4280413332190959 9036428145736469 27109284437209407 81327853311628221
• Sum of all divisors σ(n): 124201418833789440
• Sum of proper divisors (its aliquot sum) s(n): 42873565522161219
• 81327853311628221 is a deficient number, because the sum of its proper divisors (42873565522161219) is less than itself. Its deficiency is 38454287789467002

Bases of 81327853311628221

• Binary: 100100000111011110100000001101110111111000001001110111101₂
• Hexadecimal: 0x120EF406EFC13BD
• Base-36: M8SBG12SP19

Squares and roots of 81327853311628221

• 81327853311628221 squared (81327853311628221²) is 6614219724277717393391174123624841
• 81327853311628221 cubed (81327853311628221³) is 537920291506936257325036161866813645242816272237861
• The square root of 81327853311628221 is 285180387.3193740877
• The cube root of 81327853311628221 is 433257.8461153545

Scales and comparisons

• 81,327,853,311,628,221 seconds is equal to 2,585,974,171 years, 38 weeks, 4 days, 5 hours, 10 minutes, 21 seconds.
• To count from 1 to 81,327,853,311,628,221 would take you about seven billion, seven hundred fifty-seven million, nine hundred twenty-two thousand, five hundred fifteen 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 81327853311628221 cubic inches would be around 36104.8 feet tall.

Recreational maths with 81327853311628221

• 81327853311628221 backwards is 12282611335872318
• The number of decimal digits it has is: 17
• The sum of 81327853311628221's digits is 63
• More coming soon!