640345407768

Names of 640345407768

• Cardinal: 640345407768 can be written as Six hundred forty billion, three hundred forty-five million, four hundred seven thousand, seven hundred sixty-eight.

Scientific notation

• Scientific notation: 6.40345407768 × 10¹¹

Factors of 640345407768

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 24500529

Divisors of 640345407768

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 3 4 6 8 9 11 12 18 22 24 27 33 36 44 54 66 72 88 99 108 121 132 198 216 242 264 297 363 396 484 594 726 792 968 1089 1188 1452 2178 2376 2904 3267 4356 6534 8712 13068 26136 24500513 49001026 73501539 98002052 147003078 196004104 220504617 269505643 294006156 441009234 539011286 588012312 661513851 808516929 882018468 1078022572 1323027702 1617033858 1764036936 2156045144 2425550787 2646055404 2964562073 3234067716 4851101574 5292110808 5929124146 6468135432 7276652361 8893686219 9702203148 11858248292 14553304722 17787372438 19404406296 23716496584 26681058657 29106609444 35574744876 53362117314 58213218888 71149489752 80043175971 106724234628 160086351942 213448469256 320172703884 640345407768
• Sum of all divisors σ(n): 1955141017200
• Sum of proper divisors (its aliquot sum) s(n): 1314795609432
• 640345407768 is an abundant number, because the sum of its proper divisors (1314795609432) is greater than itself. Its abundance is 674450201664

Bases of 640345407768

• Binary: 1001010100010111100011111000000100011000₂
• Hexadecimal: 0x95178F8118
• Base-36: 86654EU0

Squares and roots of 640345407768

• 640345407768 squared (640345407768²) is 410042241249566194741824
• 640345407768 cubed (640345407768³) is 262568666175058094825061386764088832
• The square root of 640345407768 is 800215.8507352875
• The cube root of 640345407768 is 8619.2888114685

Scales and comparisons

• 640,345,407,768 seconds is equal to 20,361 years, 1 day, 4 hours, 22 minutes, 48 seconds.
• To count from 1 to 640,345,407,768 would take you about forty thousand, seven hundred twenty-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 640345407768 cubic inches would be around 718.3 feet tall.

Recreational maths with 640345407768

• 640345407768 backwards is 867704543046
• 640345407768 is a Harshad number.
• The number of decimal digits it has is: 12
• The sum of 640345407768's digits is 54
• More coming soon!