640040825655

Names of 640040825655

• Cardinal: 640040825655 can be written as Six hundred forty billion, forty million, eight hundred twenty-five thousand, six hundred fifty-five.

Scientific notation

• Scientific notation: 6.40040825655 × 10¹¹

Factors of 640040825655

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 140965

Divisors of 640040825655

• Number of divisors d(n): 256
• Complete list of divisors:
  1 3 5 7 9 11 15 19 21 23 27 33 35 45 55 57 63 69 77 95 99 105 115 133 135 161 165 171 189 207 209 231 253 285 297 315 345 385 399 437 483 495 513 621 627 665 693 759 805 855 945 1035 1045 1155 1197 1265 1311 1449 1463 1485 1771 1881 1995 2079 2185 2277 2415 2565 3059 3105 3135 3465 3591 3795 3933 4347 4389 4807 5313 5643 5985 6555 6831 7245 7315 8855 9177 9405 10395 11385 11799 13167 14421 15295 15939 17955 19665 21735 21945 24035 26565 27531 28215 33649 34155 39501 43263 45885 47817 58995 65835 72105 79695 82593 100947 129789 137655 140897 168245 197505 216315 239085 302841 412965 422691 504735 648945 704485 908523 986279 1268073 1514205 1549867 2113455 2677043 2958837 3240631 3804219 4542615 4649601 4931395 6340365 7749335 8031129 8876511 9721893 10849069 13385215 13948803 14794185 16203155 18739301 19021095 22684417 23248005 24093387 26629533 29165679 29447473 32547207 35646941 40155645 41846409 44382555 48609465 54245345 56217903 61571989 68053251 69744015 72280161 87497037 88342419 93696505 97641621 106940823 113422085 120466935 133147665 145828395 147237365 162736035 168653709 178234705 184715967 204159753 206132311 209232045 249528587 265027257 281089515 292924863 307859945 320822469 340266255 361400805 431003923 437485185 441712095 488208105 505961127 534704115 554147901 612479259 618396933 677291879 748585761 795081771 843268545 923579835 962467407 1020798765 1030661555 1247642935 1293011769 1325136285 1464624315 1604112345 1662443703 1855190799 2031875637 2155019615 2245757283 2529805635 2770739505 3062396295 3091984665 3386459395 3742928805 3879035307 3975408855 4741043153 4812337035 5565572397 6095626911 6465058845 6737271849 8312218515 9275953995 10159378185 11228786415 11637105921 14223129459 18286880733 19395176535 23705215765 27827861985 30478134555 33686359245 42669388377 58185529605 71115647295 91434403665 128008165131 213346941885 640040825655
• Sum of all divisors σ(n): 1558219161600
• Sum of proper divisors (its aliquot sum) s(n): 918178335945
• 640040825655 is an abundant number, because the sum of its proper divisors (918178335945) is greater than itself. Its abundance is 278137510290

Bases of 640040825655

• Binary: 1001010100000101011001111111001100110111₂
• Hexadecimal: 0x950567F337
• Base-36: 8613S5RR

Squares and roots of 640040825655

• 640040825655 squared (640040825655²) is 409652258505134106179025
• 640040825655 cubed (640040825655³) is 262194169765061529375323598242886375
• The square root of 640040825655 is 800025.5156274705
• The cube root of 640040825655 is 8617.9219983303

Scales and comparisons

• 640,040,825,655 seconds is equal to 20,351 years, 16 weeks, 3 days, 22 hours, 14 minutes, 15 seconds.
• To count from 1 to 640,040,825,655 would take you about forty thousand, seven hundred 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 640040825655 cubic inches would be around 718.2 feet tall.

Recreational maths with 640040825655

• 640040825655 backwards is 556528040046
• 640040825655 is a Harshad number.
• The number of decimal digits it has is: 12
• The sum of 640040825655's digits is 45
• More coming soon!