640929328618008864

Names of 640929328618008864

• Cardinal: 640929328618008864 can be written as Six hundred forty quadrillion, nine hundred twenty-nine trillion, three hundred twenty-eight billion, six hundred eighteen million, eight thousand, eight hundred sixty-four.

Scientific notation

• Scientific notation: 6.40929328618008864 × 10¹⁷

Factors of 640929328618008864

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 181751

Divisors of 640929328618008864

• Number of divisors d(n): 288
• Complete list of divisors:
  1 2 3 4 6 7 8 12 14 16 21 24 28 32 42 48 56 84 96 107 112 168 214 224 271 321 336 428 542 642 672 749 813 856 1084 1284 1498 1626 1712 1897 2168 2247 2568 2996 3252 3424 3794 4336 4494 5136 5691 5992 6504 7588 8672 8988 10272 11382 11984 13008 15176 17976 22764 23968 26016 28997 30352 35952 45528 57994 60704 71904 86991 91056 115988 173982 181361 182112 202979 231976 347964 362722 405958 463952 544083 608937 695928 725444 811916 927904 1088166 1217874 1269527 1391856 1450888 1623832 2176332 2435748 2539054 2783712 2901776 3247664 3808581 4352664 4871496 5078108 5803552 6495328 7617162 8705328 9742992 10156216 15234324 17410656 19405627 19485984 20312432 30468648 38811254 40624864 49148831 58216881 60937296 77622508 98297662 116433762 121874592 135839389 147446493 155245016 196595324 232867524 271678778 294892986 310490032 344041817 393190648 407518167 465735048 543357556 589785972 620980064 688083634 786381296 815036334 931470096 1032125451 1086715112 1179571944 1376167268 1572762592 1630072668 1862940192 2064250902 2173430224 2359143888 2752334536 3260145336 4128501804 4346860448 4718287776 5258924917 5504669072 6520290672 8257003608 10517849834 11009338144 13040581344 15776774751 16514007216 21035699668 31553549502 32891812321 33028014432 36812474419 42071399336 63107099004 65783624642 73624948838 84142798672 98675436963 110437423257 126214198008 131567249284 147249897676 168285597344 197350873926 220874846514 230242686247 252428396016 263134498568 294499795352 394701747852 441749693028 460485372494 504856792032 526268997136 588999590704 690728058741 789403495704 883499386056 920970744988 1052537994272 1177999181408 1381456117482 1578806991408 1766998772112 1841941489976 2762912234964 3157613982816 3519423918347 3533997544224 3683882979952 5525824469928 7038847836694 7367765959904 8913681138991 10558271755041 11051648939856 14077695673388 17827362277982 21116543510082 22103297879712 24635967428429 26741043416973 28155391346776 35654724555964 42233087020164 49271934856858 53482086833946 56310782693552 62395767972937 71309449111928 73907902285287 84466174040328 98543869713716 106964173667892 112621565387104 124791535945874 142618898223856 147815804570574 168932348080656 187187303918811 197087739427432 213928347335784 249583071891748 285237796447712 295631609141148 337864696161312 374374607837622 394175478854864 427856694671568 499166143783496 591263218282296 748749215675244 788350957709728 855713389343136 953763881872037 998332287566992 1182526436564592 1497498431350488 1907527763744074 1996664575133984 2365052873129184 2861291645616111 2994996862700976 3815055527488148 5722583291232222 5989993725401952 6676347173104259 7630111054976296 11445166582464444 13352694346208518 15260222109952592 20029041519312777 22890333164928888 26705388692417036 30520444219905184 40058083038625554 45780666329857776 53410777384834072 80116166077251108 91561332659715552 106821554769668144 160232332154502216 213643109539336288 320464664309004432 640929328618008864
• Sum of all divisors σ(n): 1947930176166524928
• Sum of proper divisors (its aliquot sum) s(n): 1307000847548516064
• 640929328618008864 is an abundant number, because the sum of its proper divisors (1307000847548516064) is greater than itself. Its abundance is 666071518930507200

Bases of 640929328618008864

• Binary: 100011100101000010011101010000011110011001111111000100100000₂
• Hexadecimal: 0x8E509D41E67F120
• Base-36: 4VAUHGSIAFXC

Squares and roots of 640929328618008864

• 640929328618008864 squared (640929328618008864²) is 410790404282731596185061739982570496
• 640929328618008864 cubed (640929328618008864³) is 263287618019651595040130673220776379410398460032876544
• The square root of 640929328618008864 is 800580619.6867426443
• The cube root of 640929328618008864 is 862190.7946563673

Scales and comparisons

• 640,929,328,618,008,864 seconds is equal to 20,379,570,125 years, 24 weeks, 3 days, 9 hours, 34 minutes, 24 seconds.
• To count from 1 to 640,929,328,618,008,864 would take you about sixty-one billion, one hundred thirty-eight million, seven hundred ten thousand, three hundred seventy-six 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 640929328618008864 cubic inches would be around 71849.2 feet tall.

Recreational maths with 640929328618008864

• 640929328618008864 backwards is 468800816823929046
• 640929328618008864 is a Harshad number.
• The number of decimal digits it has is: 18
• The sum of 640929328618008864's digits is 84
• More coming soon!