640398096855

Names of 640398096855

• Cardinal: 640398096855 can be written as Six hundred forty billion, three hundred ninety-eight million, ninety-six thousand, eight hundred fifty-five.

Scientific notation

• Scientific notation: 6.40398096855 × 10¹¹

Factors of 640398096855

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 358

Divisors of 640398096855

• Number of divisors d(n): 216
• Complete list of divisors:
  1 3 5 9 11 15 29 33 45 55 71 87 99 121 145 165 213 239 261 319 355 363 435 495 605 639 717 781 957 1065 1089 1195 1305 1595 1815 2059 2151 2343 2629 2871 3195 3509 3585 3905 4785 5445 6177 6931 7029 7887 8591 10295 10527 10755 11715 13145 14355 16969 17545 18531 20793 22649 23661 25773 28919 30885 31581 34655 35145 39435 42955 50907 52635 57121 62379 67947 76241 77319 84845 86757 92655 103965 113245 118305 128865 144595 152721 157905 171363 186659 203841 228723 249139 254535 260271 285605 311895 339735 381205 386595 433785 492101 514089 559977 628331 686169 747417 763605 838651 856815 933295 1019205 1143615 1245695 1301355 1476303 1656509 1679931 1884993 2053249 2242251 2460505 2515953 2570445 2799885 3141655 3430845 3737085 4055591 4193255 4428909 4969527 5413111 5654979 6159747 6911641 7381515 7547859 8282545 8399655 9424965 10266245 11211255 12166773 12579765 14908581 16239333 18221599 18479241 20277955 20734923 22144545 24847635 27065555 28274895 30798735 34558205 36500319 37739295 44611501 48717999 54664797 59544221 60833865 62204769 74542905 81196665 91107995 92396205 103674615 117612139 133834503 163994391 178632663 182501595 200437589 223057505 243589995 273323985 297721105 311023845 352836417 401503509 490726511 535897989 588060695 601312767 669172515 819971955 893163315 1002187945 1058509251 1293733529 1472179533 1764182085 1803938301 2007517545 2453632555 2679489945 3006563835 3881200587 4416538599 5292546255 6468667645 7360897665 9019691505 11643601761 14231068819 19406002935 22082692995 42693206457 58218008805 71155344095 128079619371 213466032285 640398096855
• Sum of all divisors σ(n): 1285336110240
• Sum of proper divisors (its aliquot sum) s(n): 644938013385
• 640398096855 is an abundant number, because the sum of its proper divisors (644938013385) is greater than itself. Its abundance is 4539916530

Bases of 640398096855

• Binary: 1001010100011010101100110111100111010111₂
• Hexadecimal: 0x951AB379D7
• Base-36: 8670HPZR

Squares and roots of 640398096855

• 640398096855 squared (640398096855²) is 410109722455505960891025
• 640398096855 cubed (640398096855³) is 262633485762238274770720470050226375
• The square root of 640398096855 is 800248.7718547277
• The cube root of 640398096855 is 8619.5252099275

Scales and comparisons

• 640,398,096,855 seconds is equal to 20,362 years, 35 weeks, 2 days, 14 minutes, 15 seconds.
• To count from 1 to 640,398,096,855 would take you about forty thousand, seven hundred twenty-five 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 640398096855 cubic inches would be around 718.3 feet tall.

Recreational maths with 640398096855

• 640398096855 backwards is 558690893046
• The number of decimal digits it has is: 12
• The sum of 640398096855's digits is 63
• More coming soon!