640708855740

Names of 640708855740

• Cardinal: 640708855740 can be written as Six hundred forty billion, seven hundred eight million, eight hundred fifty-five thousand, seven hundred forty.

Scientific notation

• Scientific notation: 6.4070885574 × 10¹¹

Factors of 640708855740

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 32481

Divisors of 640708855740

• Number of divisors d(n): 288
• Complete list of divisors:
  1 2 3 4 5 6 9 10 12 15 17 18 20 27 30 34 36 45 51 54 60 68 85 90 102 108 127 135 153 170 180 204 254 255 270 289 306 340 381 459 508 510 540 578 612 635 762 765 867 918 1020 1143 1156 1270 1445 1524 1530 1734 1836 1905 2159 2286 2295 2540 2601 2890 3060 3429 3468 3810 4318 4335 4572 4590 5202 5715 5780 6477 6858 7620 7803 8636 8670 9180 10404 10795 11430 12954 13005 13716 15606 17145 17340 19431 21590 22860 25908 26010 31212 32327 32385 34290 36703 38862 39015 43180 52020 58293 64654 64770 68580 73406 77724 78030 96981 97155 110109 116586 129308 129540 146812 156060 161635 183515 193962 194310 220218 233172 290943 291465 323270 330327 367030 387924 388620 440436 484905 549559 550545 581886 582930 646540 660654 734060 872829 969810 990981 1099118 1101090 1163772 1165860 1321308 1454715 1648677 1651635 1745658 1939620 1981962 2198236 2202180 2747795 2909430 3297354 3303270 3491316 3963924 4105529 4364145 4946031 4954905 5495590 5818860 6594708 6606540 8211058 8243385 8728290 9342503 9892062 9909810 10991180 12316587 14838093 16422116 16486770 17456580 18685006 19784124 19819620 20527645 24633174 24730155 28027509 29676186 32973540 36949761 37370012 41055290 46712515 49266348 49460310 56055018 59352372 61582935 69793993 73899522 74190465 82110580 84082527 93425030 98920620 110849283 112110036 123165870 139587986 140137545 147799044 148380930 168165054 184748805 186850060 209381979 221698566 246331740 252247581 279175972 280275090 296761860 336330108 348969965 369497610 418763958 420412635 443397132 504495162 554246415 560550180 628145937 697939930 738995220 837527916 840825270 1008990324 1046909895 1108492830 1186497881 1256291874 1261237905 1395879860 1681650540 1884437811 2093819790 2216985660 2372995762 2512583748 2522475810 3140729685 3559493643 3768875622 4187639580 4745991524 5044951620 5932489405 6281459370 7118987286 7537751244 9422189055 10678480929 11864978810 12562918740 14237974572 17797468215 18844378110 21356961858 23729957620 32035442787 35594936430 37688756220 42713923716 53392404645 64070885574 71189872860 106784809290 128141771148 160177213935 213569618580 320354427870 640708855740
• Sum of all divisors σ(n): 2134206627840
• Sum of proper divisors (its aliquot sum) s(n): 1493497772100
• 640708855740 is an abundant number, because the sum of its proper divisors (1493497772100) is greater than itself. Its abundance is 852788916360

Bases of 640708855740

• Binary: 1001010100101101001110010100011110111100₂
• Hexadecimal: 0x952D3947BC
• Base-36: 86C5ID30

Squares and roots of 640708855740

• 640708855740 squared (640708855740²) is 410507837823660130947600
• 640708855740 cubed (640708855740³) is 263016007044298774398095357899224000
• The square root of 640708855740 is 800442.9122304725
• The cube root of 640708855740 is 8620.9192182809

Scales and comparisons

• 640,708,855,740 seconds is equal to 20,372 years, 29 weeks, 18 hours, 9 minutes.
• To count from 1 to 640,708,855,740 would take you about forty thousand, seven hundred forty-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 640708855740 cubic inches would be around 718.4 feet tall.

Recreational maths with 640708855740

• 640708855740 backwards is 047558807046
• 640708855740 is a Harshad number.
• The number of decimal digits it has is: 12
• The sum of 640708855740's digits is 54
• More coming soon!