644840216020

Names of 644840216020

• Cardinal: 644840216020 can be written as Six hundred forty-four billion, eight hundred forty million, two hundred sixteen thousand and twenty.

Scientific notation

• Scientific notation: 6.4484021602 × 10¹¹

Factors of 644840216020

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 514

Divisors of 644840216020

• Number of divisors d(n): 432
• Complete list of divisors:
  1 2 4 5 7 10 11 13 14 20 22 26 28 35 44 52 55 65 70 77 79 91 110 130 140 143 154 158 169 182 220 260 286 308 316 338 364 385 395 397 455 553 572 676 715 770 790 794 845 869 910 1001 1027 1106 1183 1430 1540 1580 1588 1690 1738 1820 1859 1985 2002 2054 2212 2366 2765 2779 2860 3380 3476 3718 3970 4004 4108 4345 4367 4732 5005 5135 5161 5530 5558 5915 6083 6241 7189 7436 7940 8690 8734 9295 10010 10270 10322 11060 11116 11297 11830 12166 12482 13013 13351 13895 14378 17380 17468 18590 20020 20540 20644 21835 22594 23660 24332 24964 25805 26026 26702 27790 28756 30415 30569 31205 31363 35945 36127 37180 43670 43687 45188 51610 52052 53404 55580 56485 56771 60830 61138 62410 62726 65065 66755 67093 68651 71890 72254 79079 81133 87340 87374 93457 103220 112970 113542 121660 122276 124820 125452 130130 133510 134186 137302 143780 144508 146861 152845 156815 158158 162266 174748 180635 186914 218435 219541 225940 227084 260260 267020 268372 274604 283855 293722 305690 313630 316316 324532 335465 343255 344993 361270 373828 395395 397397 405665 407719 436870 439082 467285 469651 480557 567710 567931 587444 611380 627260 670930 686510 689986 722540 734305 738023 790790 794794 811330 815438 873740 878164 892463 934570 939302 961114 1028027 1054729 1097705 1135420 1135862 1341860 1373020 1379972 1468610 1476046 1581580 1589588 1622660 1630876 1724965 1784926 1869140 1878604 1922228 1986985 2038595 2056054 2109458 2195410 2271724 2348255 2402785 2414951 2477677 2839655 2854033 2937220 2952092 3449930 3569852 3690115 3973970 4077190 4112108 4218916 4390820 4462315 4484909 4696510 4805570 4829902 4955354 5140135 5166161 5273645 5300347 5679310 5708066 6247241 6899860 7380230 7383103 7947940 8154380 8924630 8969818 9393020 9611140 9659804 9910708 10280270 10332322 10547290 10600694 11358620 11416132 11602019 12074755 12388385 12494482 14270165 14760460 14766206 17343739 17849260 17939636 20560540 20664644 21094580 21201388 22424545 23204038 24149510 24776770 24988964 25830805 26501735 27254447 28540330 29532412 31236205 31394363 32209801 34687478 36915515 37102429 44849090 46408076 48299020 49553540 51661610 53003470 54508894 57080660 58010095 58303817 62472410 62788726 64419602 69374956 73831030 74204858 81214133 86718695 89698180 103323220 106006940 109017788 116020190 116607634 124944820 125577452 128839204 136272235 147662060 148409716 156971815 161049005 162428266 173437390 185512145 190781129 225468607 232040380 233215268 272544470 291519085 313943630 322098010 324856532 346874780 354307811 371024290 381562258 406070665 408126719 418727413 450937214 545088940 583038170 627887260 644196020 708615622 742048580 763124516 812141330 816253438 837454826 901874428 953905645 1127343035 1166076340 1417231244 1624282660 1632506876 1674909652 1771539055 1907811290 2040633595 2093637065 2254686070 2480154677 2931091891 3543078110 3815622580 4081267190 4187274130 4509372140 4606001543 4960309354 5862183782 7086156220 8162534380 8374548260 9212003086 9920618708 11724367564 12400773385 14655459455 18424006172 23030007715 24801546770 29310918910 32242010801 46060015430 49603093540 58621837820 64484021602 92120030860 128968043204 161210054005 322420108010 644840216020
• Sum of all divisors σ(n): 1856267134848
• Sum of proper divisors (its aliquot sum) s(n): 1211426918828
• 644840216020 is an abundant number, because the sum of its proper divisors (1211426918828) is greater than itself. Its abundance is 566586702808

Bases of 644840216020

• Binary: 1001011000100011011110001101010111010100₂
• Hexadecimal: 0x962378D5D4
• Base-36: 888H7R2S

Squares and roots of 644840216020

• 644840216020 squared (644840216020²) is 415818904196720264640400
• 644840216020 cubed (644840216020³) is 268136752007412780026227103619208000
• The square root of 644840216020 is 803019.4368880495
• The cube root of 644840216020 is 8639.4090746149

Scales and comparisons

• 644,840,216,020 seconds is equal to 20,503 years, 48 weeks, 10 hours, 13 minutes, 40 seconds.
• To count from 1 to 644,840,216,020 would take you about forty-one thousand and seven 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 644840216020 cubic inches would be around 720 feet tall.

Recreational maths with 644840216020

• 644840216020 backwards is 020612048446
• The number of decimal digits it has is: 12
• The sum of 644840216020's digits is 37
• More coming soon!