640509707929

Names of 640509707929

• Cardinal: 640509707929 can be written as Six hundred forty billion, five hundred nine million, seven hundred seven thousand, nine hundred twenty-nine.

Scientific notation

• Scientific notation: 6.40509707929 × 10¹¹

Factors of 640509707929

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 19494

Divisors of 640509707929

• Number of divisors d(n): 64
• Complete list of divisors:
  1 7 13 43 67 91 127 301 469 559 871 889 1651 2881 3913 5461 6097 8509 11557 19237 20167 37453 38227 59563 70993 110617 134659 250081 262171 365887 496951 774319 827191 1288879 1750567 2443099 2561209 4756531 5790337 9022153 10753483 16755427 17101693 31760287 33295717 55421797 75274381 105053257 117287989 163687633 222322009 387952579 720483361 735372799 1145813431 1365692341 2127939229 5043383527 7038568219 9559846387 14895574603 49269977533 91501386847 640509707929
• Sum of all divisors σ(n): 825181536256
• Sum of proper divisors (its aliquot sum) s(n): 184671828327
• 640509707929 is a deficient number, because the sum of its proper divisors (184671828327) is less than itself. Its deficiency is 455837879602

Bases of 640509707929

• Binary: 1001010100100001010110101000011010011001₂
• Hexadecimal: 0x95215A8699
• Base-36: 868UXXND

Squares and roots of 640509707929

• 640509707929 squared (640509707929²) is 410252685951292885469041
• 640509707929 cubed (640509707929³) is 262770828055750367591711099081726089
• The square root of 640509707929 is 800318.5040526053
• The cube root of 640509707929 is 8620.0259289787

Scales and comparisons

• 640,509,707,929 seconds is equal to 20,366 years, 11 weeks, 5 days, 19 hours, 18 minutes, 49 seconds.
• To count from 1 to 640,509,707,929 would take you about forty thousand, seven hundred thirty-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 640509707929 cubic inches would be around 718.3 feet tall.

Recreational maths with 640509707929

• 640509707929 backwards is 929707905046
• The number of decimal digits it has is: 12
• The sum of 640509707929's digits is 58
• More coming soon!