644381764642

Names of 644381764642

• Cardinal: 644381764642 can be written as Six hundred forty-four billion, three hundred eighty-one million, seven hundred sixty-four thousand, six hundred forty-two.

Scientific notation

• Scientific notation: 6.44381764642 × 10¹¹

Factors of 644381764642

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 189

Divisors of 644381764642

• Number of divisors d(n): 216
• Complete list of divisors:
  1 2 7 11 14 19 22 38 49 71 77 79 98 133 142 154 158 209 266 418 497 539 553 781 869 931 994 1078 1106 1349 1463 1501 1562 1738 1862 2698 2926 3002 3479 3871 5041 5467 5609 6083 6241 6958 7742 9443 10082 10241 10507 10934 11218 12166 12482 14839 16511 18886 20482 21014 29678 33022 35287 38269 39263 42581 43687 55451 61699 66101 68651 70574 73549 76538 78526 85162 87374 95779 103873 106571 110902 115577 118579 123398 132202 137302 147098 191558 207746 213142 231154 237158 247009 274841 305809 388157 398239 431893 443111 480557 494018 549682 611618 670453 727111 745997 776314 796478 809039 830053 863786 886222 961114 1053569 1172281 1304369 1340906 1454222 1491994 1618078 1660106 2107138 2344562 2608738 2717099 2787673 3023251 3101777 3363899 4380629 4693171 4874221 5221979 5434198 5575346 5810371 6046502 6203554 6727798 7374983 7566541 8205967 8419109 8761258 9130583 9386342 9748442 10443958 11620742 14749966 15133082 16411934 16838218 18261166 19513711 21712439 30664403 31460881 34119547 39027422 43424878 51624881 52965787 57441769 58933763 61328806 62921762 63914081 68239094 83231951 92610199 103249762 105931574 114883538 117867526 127828162 166463902 185220398 214650821 220226167 238836829 346069691 370760509 412536341 429301642 440452334 477673658 582623657 597756739 648271393 692139382 741521018 825072682 1165247314 1195513478 1296542786 1541583169 2422487837 3083166338 4078365599 4184297173 4537899751 4844975674 6575324129 8156731198 8368594346 9075799502 13150648258 16957414859 29290080211 33914829718 46027268903 58580160422 92054537806 322190882321 644381764642
• Sum of all divisors σ(n): 1326382963920
• Sum of proper divisors (its aliquot sum) s(n): 682001199278
• 644381764642 is an abundant number, because the sum of its proper divisors (682001199278) is greater than itself. Its abundance is 37619434636

Bases of 644381764642

• Binary: 1001011000001000001001010110110000100010₂
• Hexadecimal: 0x9608256C22
• Base-36: 880W9JQA

Squares and roots of 644381764642

• 644381764642 squared (644381764642²) is 415227858603137881388164
• 644381764642 cubed (644381764642³) is 267565260255208849167342406892497288
• The square root of 644381764642 is 802733.9314131427
• The cube root of 644381764642 is 8637.3611833163

Scales and comparisons

• 644,381,764,642 seconds is equal to 20,489 years, 18 weeks, 6 hours, 37 minutes, 22 seconds.
• To count from 1 to 644,381,764,642 would take you about forty thousand, nine hundred seventy-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 644381764642 cubic inches would be around 719.8 feet tall.

Recreational maths with 644381764642

• 644381764642 backwards is 246467183446
• The number of decimal digits it has is: 12
• The sum of 644381764642's digits is 55
• More coming soon!