640449806425

Names of 640449806425

• Cardinal: 640449806425 can be written as Six hundred forty billion, four hundred forty-nine million, eight hundred six thousand, four hundred twenty-five.

Scientific notation

• Scientific notation: 6.40449806425 × 10¹¹

Factors of 640449806425

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 487

Divisors of 640449806425

• Number of divisors d(n): 288
• Complete list of divisors:
  1 5 11 13 17 25 31 55 65 79 85 143 155 169 187 221 275 325 331 341 395 403 425 527 715 775 845 869 935 1027 1105 1343 1655 1705 1859 1975 2015 2431 2449 2635 2873 3575 3641 4225 4303 4345 4433 4675 5135 5239 5525 5627 5797 6715 6851 8275 8525 9295 10075 10261 11297 12155 12245 13175 13351 14365 14773 17459 18205 21515 21725 22165 25675 26149 26195 26939 28135 28985 31603 31837 33575 34255 41633 46475 47333 51305 55939 56485 57629 60775 61225 61897 66755 71825 73151 73865 75361 87295 89063 91025 107575 110825 112871 130745 130975 133393 134695 140675 144925 146861 158015 159185 171275 174437 192049 208165 226967 236665 256525 279695 282425 287639 288145 309485 333775 339937 350207 365755 369325 376805 413881 436475 444533 445315 457963 541229 564355 615329 653725 666965 673475 734305 790075 795925 804661 810619 872185 950963 960245 979693 1040825 1134835 1183325 1398475 1438195 1440725 1467323 1547425 1699685 1734109 1751035 1828775 1884025 1918807 2069405 2222665 2226575 2267681 2289815 2496637 2706145 2821775 3076645 3334825 3671525 3739307 4023305 4053095 4360925 4419181 4552691 4754815 4801225 4889863 4898465 5674175 5778929 5953519 7035977 7190975 7336615 8498425 8670545 8755175 8916809 9594035 10347025 10460593 10538047 11113325 11338405 11449075 12483185 13530725 13780523 15383225 18696535 19075199 20116525 20265475 22095905 22763455 23774075 24449315 24492325 24944491 28894645 29479853 29767595 35179885 36683075 43352725 44584045 47970175 48610991 52302965 52690235 56692025 62415925 63568219 68902615 75126077 77395747 93482675 95375995 110479525 113817275 115918517 122246575 124722455 136994611 144473225 147399265 148837975 151585753 175899425 179146799 222920225 243054955 261514825 263451175 317841095 324278383 344513075 375630385 386978735 476879975 579592585 623612275 684973055 736996325 757928765 826386847 895733995 1215274775 1506940721 1589205475 1621391915 1878151925 1934893675 1970614789 2328908387 2897962925 3424865275 3789643825 4131934235 4478669975 7534703605 8106959575 9853073945 11644541935 20659671175 25617992257 37673518025 49265369725 58222709675 128089961285 640449806425
• Sum of all divisors σ(n): 1041464770560
• Sum of proper divisors (its aliquot sum) s(n): 401014964135
• 640449806425 is a deficient number, because the sum of its proper divisors (401014964135) is less than itself. Its deficiency is 239434842290

Bases of 640449806425

• Binary: 1001010100011101110010001000000001011001₂
• Hexadecimal: 0x951DC88059
• Base-36: 867VA1CP

Squares and roots of 640449806425

• 640449806425 squared (640449806425²) is 410175954549819971280625
• 640449806425 cubed (640449806425³) is 262697110691621798625275340603015625
• The square root of 640449806425 is 800281.0796370235
• The cube root of 640449806425 is 8619.7572010115

Scales and comparisons

• 640,449,806,425 seconds is equal to 20,364 years, 16 weeks, 5 days, 12 hours, 25 seconds.
• To count from 1 to 640,449,806,425 would take you about forty thousand, seven hundred twenty-eight 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 640449806425 cubic inches would be around 718.3 feet tall.

Recreational maths with 640449806425

• 640449806425 backwards is 524608944046
• The number of decimal digits it has is: 12
• The sum of 640449806425's digits is 52
• More coming soon!