640772029401382809

Names of 640772029401382809

• Cardinal: 640772029401382809 can be written as Six hundred forty quadrillion, seven hundred seventy-two trillion, twenty-nine billion, four hundred one million, three hundred eighty-two thousand, eight hundred nine.

Scientific notation

• Scientific notation: 6.40772029401382809 × 10¹⁷

Factors of 640772029401382809

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 5
• Sum of prime factors: 424063994

Divisors of 640772029401382809

• Number of divisors d(n): 24
• Complete list of divisors:
  1 3 7 9 21 63 25520381 76561143 178642667 229683429 398543603 535928001 1195630809 1607784003 2789805221 3586892427 8369415663 25108246989 10170984593672743 30512953781018229 71196892155709201 91538861343054687 213590676467127603 640772029401382809
• Sum of all divisors σ(n): 1057782441844619712
• Sum of proper divisors (its aliquot sum) s(n): 417010412443236903
• 640772029401382809 is a deficient number, because the sum of its proper divisors (417010412443236903) is less than itself. Its deficiency is 223761616958145906

Bases of 640772029401382809

• Binary: 100011100100011110101100010000001010011110011011111110011001₂
• Hexadecimal: 0x8E47AC40A79BF99
• Base-36: 4V9AQ6J22109

Squares and roots of 640772029401382809

• 640772029401382809 squared (640772029401382809²) is 410588793663166595018407081360730481
• 640772029401382809 cubed (640772029401382809³) is 263093814565012884999409205614936992254577491755701129
• The square root of 640772029401382809 is 800482372.9485758071
• The cube root of 640772029401382809 is 862120.2548807727

Scales and comparisons

• 640,772,029,401,382,809 seconds is equal to 20,374,568,496 years, 48 weeks, 6 days, 9 hours, 9 seconds.
• To count from 1 to 640,772,029,401,382,809 would take you about sixty-one billion, one hundred twenty-three million, seven hundred five thousand, four hundred ninety 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 640772029401382809 cubic inches would be around 71843.4 feet tall.

Recreational maths with 640772029401382809

• 640772029401382809 backwards is 908283104920277046
• The number of decimal digits it has is: 18
• The sum of 640772029401382809's digits is 72
• More coming soon!