642661666731

Names of 642661666731

• Cardinal: 642661666731 can be written as Six hundred forty-two billion, six hundred sixty-one million, six hundred sixty-six thousand, seven hundred thirty-one.

Scientific notation

• Scientific notation: 6.42661666731 × 10¹¹

Factors of 642661666731

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 1258

Divisors of 642661666731

• Number of divisors d(n): 288
• Complete list of divisors:
  1 3 7 9 19 21 23 27 49 57 63 69 81 113 133 147 161 171 189 207 243 339 399 437 441 483 513 567 621 791 931 1017 1093 1127 1197 1311 1323 1449 1539 1701 1863 2147 2373 2599 2793 3051 3059 3279 3381 3591 3933 3969 4347 4617 5537 5589 6441 7119 7651 7797 8379 9153 9177 9837 10143 10773 11799 11907 13041 15029 16611 18193 19323 20767 21357 21413 22953 23391 25137 25139 27459 27531 29511 30429 32319 35397 39123 45087 49381 49833 53557 54579 57969 62301 64071 64239 68859 70173 75411 75417 82593 88533 91287 105203 106191 123509 127351 135261 145369 148143 149499 160671 163737 173907 175973 186903 192213 192717 206577 210519 226233 226251 247779 265599 273861 315609 345667 370527 382053 405783 436107 444429 448497 477641 482013 491211 521721 527919 560709 578151 619731 631557 678753 743337 864563 946827 1017583 1037001 1111581 1146159 1217349 1231811 1308321 1333287 1345491 1432923 1446039 1473633 1583757 1682127 1734453 1859193 2036259 2346671 2419669 2593689 2840481 2840707 3052749 3111003 3334743 3343487 3438477 3652047 3695433 3924963 3999861 4298769 4338117 4420899 4751271 5046381 5203359 6051941 6108777 7040013 7259007 7781067 8521443 8522121 9158247 9333009 10004229 10030461 10315431 11086299 11774889 11999583 12896307 13014351 14253813 16426697 18155823 19884949 21120039 21777021 23343201 23404409 25564329 25566363 27474741 27999027 30012687 30091383 30946293 33258897 35324667 38688921 42761439 49280091 53973433 54467469 59654847 63360117 65331063 70029603 70213227 76699089 82424223 83997081 90274149 99776691 114986879 116066763 139194643 147840273 161920299 163402407 178964541 190080351 195993189 210088809 210639681 230097267 247272669 270822447 299330073 344960637 377814031 417583929 443520819 485760897 490207221 536893623 570241053 587979567 631919043 690291801 812467341 1034881911 1133442093 1252751787 1330562457 1457282691 1470621663 1610680869 1895757129 2644698217 3104645733 3400326279 3758255361 3991687371 4371848073 4832042607 5687271387 7934094651 9313937199 10200978837 11274766083 13115544219 23802283953 27941811597 30602936511 33824298249 71406851859 91808809533 214220555577 642661666731
• Sum of all divisors σ(n): 1242051632640
• Sum of proper divisors (its aliquot sum) s(n): 599389965909
• 642661666731 is a deficient number, because the sum of its proper divisors (599389965909) is less than itself. Its deficiency is 43271700822

Bases of 642661666731

• Binary: 1001010110100001100111101100111110101011₂
• Hexadecimal: 0x95A19ECFAB
• Base-36: 878G5VOR

Squares and roots of 642661666731

• 642661666731 squared (642661666731²) is 413014017885466912226361
• 642661666731 cubed (642661666731³) is 265428277117541210073545242214895891
• The square root of 642661666731 is 801661.8156872633
• The cube root of 642661666731 is 8629.6688767139

Scales and comparisons

• 642,661,666,731 seconds is equal to 20,434 years, 33 weeks, 6 days, 17 hours, 38 minutes, 51 seconds.
• To count from 1 to 642,661,666,731 would take you about forty thousand, eight hundred sixty-nine 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 642661666731 cubic inches would be around 719.1 feet tall.

Recreational maths with 642661666731

• 642661666731 backwards is 137666166246
• The number of decimal digits it has is: 12
• The sum of 642661666731's digits is 54
• More coming soon!