128678605642720

Names of 128678605642720

• Cardinal: 128678605642720 can be written as One hundred twenty-eight trillion, six hundred seventy-eight billion, six hundred five million, six hundred forty-two thousand, seven hundred twenty.

Scientific notation

• Scientific notation: 1.2867860564272 × 10¹⁴

Factors of 128678605642720

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 678244

Divisors of 128678605642720

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 4 5 7 8 10 14 16 20 28 32 35 40 56 70 80 112 140 160 224 280 560 1120 328753 349477 657506 698954 1315012 1397908 1643765 1747385 2301271 2446339 2630024 2795816 3287530 3494770 4602542 4892678 5260048 5591632 6575060 6989540 9205084 9785356 10520096 11183264 11506355 12231695 13150120 13979080 18410168 19570712 23012710 24463390 26300240 27958160 36820336 39141424 46025420 48926780 52600480 55916320 73640672 78282848 92050840 97853560 184101680 195707120 368203360 391414240 114891612181 229783224362 459566448724 574458060905 804241285267 919132897448 1148916121810 1608482570534 1838265794896 2297832243620 3216965141068 3676531589792 4021206426335 4595664487240 6433930282136 8042412852670 9191328974480 12867860564272 16084825705340 18382657948960 25735721128544 32169651410680 64339302821360 128678605642720
• Sum of all divisors σ(n): 347434286205888
• Sum of proper divisors (its aliquot sum) s(n): 218755680563168
• 128678605642720 is an abundant number, because the sum of its proper divisors (218755680563168) is greater than itself. Its abundance is 90077074920448

Bases of 128678605642720

• Binary: 11101010000100001010010100101000101101111100000₂
• Hexadecimal: 0x750852945BE0
• Base-36: 19M24VEZTS

Squares and roots of 128678605642720

• 128678605642720 squared (128678605642720²) is 16558183550154651424288998400
• 128678605642720 cubed (128678605642720³) is 2130683971210123810894168994378257051648000
• The square root of 128678605642720 is 11343659.2703906617
• The cube root of 128678605642720 is 50485.7464779843

Scales and comparisons

• 128,678,605,642,720 seconds is equal to 4,091,581 years, 32 weeks, 5 days, 10 hours, 58 minutes, 40 seconds.
• To count from 1 to 128,678,605,642,720 would take you about ten million, two hundred twenty-eight thousand, nine hundred fifty-four 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 128678605642720 cubic inches would be around 4207.1 feet tall.

Recreational maths with 128678605642720

• 128678605642720 backwards is 027246506876821
• The number of decimal digits it has is: 15
• The sum of 128678605642720's digits is 64
• More coming soon!