640415835412855821

Names of 640415835412855821

• Cardinal: 640415835412855821 can be written as Six hundred forty quadrillion, four hundred fifteen trillion, eight hundred thirty-five billion, four hundred twelve million, eight hundred fifty-five thousand, eight hundred twenty-one.

Scientific notation

• Scientific notation: 6.40415835412855821 × 10¹⁷

Factors of 640415835412855821

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 4062824704

Divisors of 640415835412855821

• Number of divisors d(n): 36
• Complete list of divisors:
  1 3 9 11 33 99 121 363 1089 144751 434253 1302759 1592261 4776783 14330349 17514871 52544613 157633839 4062679939 12188039817 36564119451 44689479329 134068437987 402205313961 491584272619 1474752817857 4424258453571 588076983850189 1764230951550567 5292692854651701 6468846822352079 19406540467056237 58219621401168711 71157315045872869 213471945137618607 640415835412855821
• Sum of all divisors σ(n): 1016792129700867520
• Sum of proper divisors (its aliquot sum) s(n): 376376294288011699
• 640415835412855821 is a deficient number, because the sum of its proper divisors (376376294288011699) is less than itself. Its deficiency is 264039541124844122

Bases of 640415835412855821

• Binary: 100011100011001101101100111100101010010100010111110000001101₂
• Hexadecimal: 0x8E336CF2A517C0D
• Base-36: 4V5SGT9PXYX9

Squares and roots of 640415835412855821

• 640415835412855821 squared (640415835412855821²) is 410132442247546035851100998933584041
• 640415835412855821 cubed (640415835412855821³) is 262655310631877037413368485767987069828334198719552661
• The square root of 640415835412855821 is 800259854.9301694297
• The cube root of 640415835412855821 is 861960.4794035985

Scales and comparisons

• 640,415,835,412,855,821 seconds is equal to 20,363,242,629 years, 46 weeks, 10 hours, 10 minutes, 21 seconds.
• To count from 1 to 640,415,835,412,855,821 would take you about sixty-one billion, eighty-nine million, seven hundred twenty-seven thousand, eight hundred eighty-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 640415835412855821 cubic inches would be around 71830 feet tall.

Recreational maths with 640415835412855821

• 640415835412855821 backwards is 128558214538514046
• The number of decimal digits it has is: 18
• The sum of 640415835412855821's digits is 72
• More coming soon!