640352985818

Names of 640352985818

• Cardinal: 640352985818 can be written as Six hundred forty billion, three hundred fifty-two million, nine hundred eighty-five thousand, eight hundred eighteen.

Scientific notation

• Scientific notation: 6.40352985818 × 10¹¹

Factors of 640352985818

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 74

Divisors of 640352985818

• Number of divisors d(n): 240
• Complete list of divisors:
  1 2 7 13 14 23 26 29 46 49 58 91 98 161 169 182 203 299 322 338 343 377 406 598 637 667 686 754 1127 1183 1274 1334 1421 2093 2197 2254 2366 2401 2639 2842 3887 4186 4394 4459 4669 4802 4901 5278 7774 7889 8281 8671 8918 9338 9802 9947 14651 15379 15778 16562 16807 17342 18473 19894 27209 28561 29302 30758 31213 32683 33614 34307 36946 50531 54418 55223 57122 57967 60697 62426 63713 65366 68614 69629 101062 102557 107653 110446 112723 115934 121394 127426 129311 139258 190463 199927 205114 215306 218491 225446 228781 240149 258622 353717 380926 386561 399854 405769 424879 436982 445991 457562 480298 487403 656903 707434 717899 753571 773122 789061 811538 828269 849758 891982 905177 974806 1313806 1333241 1399489 1435798 1465399 1507142 1578122 1601467 1656538 1681043 1810354 2476019 2666482 2798978 2840383 2930798 2974153 3121937 3202934 3362086 4598321 4952038 5025293 5274997 5523427 5680766 5797883 5948306 6243874 6336239 9196642 9332687 9796423 10050586 10257793 10549994 11046854 11210269 11595766 11767301 12672478 17332133 18665374 19050187 19592846 20515586 20819071 21853559 22420538 23534602 32188247 34664266 36924979 38100374 38663989 40585181 41638142 43707118 64376494 65328809 68574961 71804551 73849958 77327978 81170362 82371107 121324931 130657618 133351309 137149922 143609102 145733497 152974913 164742214 225317729 242649862 266702618 270647923 284096267 291466994 305949826 450635458 480024727 502631857 541295846 568192534 849274517 933459163 960049454 1005263714 1070824391 1577224103 1698549034 1866918326 1894535461 1988673869 2141648782 3154448206 3518422999 3789070922 3977347738 6534214141 7036845998 11040568721 13068428282 13920717083 22081137442 24628960993 27841434166 45739498987 49257921986 91478997974 320176492909 640352985818
• Sum of all divisors σ(n): 1310452836480
• Sum of proper divisors (its aliquot sum) s(n): 670099850662
• 640352985818 is an abundant number, because the sum of its proper divisors (670099850662) is greater than itself. Its abundance is 29746864844

Bases of 640352985818

• Binary: 1001010100011000000000110010001011011010₂
• Hexadecimal: 0x95180322DA
• Base-36: 8669MU3E

Squares and roots of 640352985818

• 640352985818 squared (640352985818²) is 410051946446027709129124
• 640352985818 cubed (640352985818³) is 262577988247196477126396969902763432
• The square root of 640352985818 is 800220.5857249611
• The cube root of 640352985818 is 8619.3228124641

Scales and comparisons

• 640,352,985,818 seconds is equal to 20,361 years, 12 weeks, 4 days, 21 hours, 23 minutes, 38 seconds.
• To count from 1 to 640,352,985,818 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 640352985818 cubic inches would be around 718.3 feet tall.

Recreational maths with 640352985818

• 640352985818 backwards is 818589253046
• The number of decimal digits it has is: 12
• The sum of 640352985818's digits is 59
• More coming soon!