81988247640

Names of 81988247640

• Cardinal: 81988247640 can be written as Eighty-one billion, nine hundred eighty-eight million, two hundred forty-seven thousand, six hundred forty.

Scientific notation

• Scientific notation: 8.198824764 × 10¹⁰

Factors of 81988247640

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 55477

Divisors of 81988247640

• Number of divisors d(n): 192
• Complete list of divisors:
  1 2 3 4 5 6 8 10 12 13 15 20 24 26 30 39 40 52 60 65 73 78 104 120 130 146 156 169 195 219 260 292 312 338 365 390 438 507 520 584 676 730 780 845 876 949 1014 1095 1352 1460 1560 1690 1752 1898 2028 2190 2535 2847 2920 3380 3796 4056 4380 4745 5070 5694 6760 7592 8760 9490 10140 11388 12337 14235 18980 20280 22776 24674 28470 37011 37960 49348 55381 56940 61685 74022 98696 110762 113880 123370 148044 166143 185055 221524 246740 276905 296088 332286 370110 443048 493480 553810 664572 719953 740220 830715 1107620 1329144 1439906 1480440 1661430 2159859 2215240 2879812 3322860 3599765 4042813 4319718 5759624 6645720 7199530 8085626 8639436 9359389 10799295 12128439 14399060 16171252 17278872 18718778 20214065 21598590 24256878 28078167 28798120 32342504 37437556 40428130 43197180 46796945 48513756 52556569 56156334 60642195 74875112 80856260 86394360 93593890 97027512 105113138 112312668 121284390 140390835 157669707 161712520 187187780 210226276 224625336 242568780 262782845 280781670 315339414 374375560 420452552 485137560 525565690 561563340 630678828 683235397 788348535 1051131380 1123126680 1261357656 1366470794 1576697070 2049706191 2102262760 2732941588 3153394140 3416176985 4099412382 5465883176 6306788280 6832353970 8198824764 10248530955 13664707940 16397649528 20497061910 27329415880 40994123820 81988247640
• Sum of all divisors σ(n): 269993895840
• Sum of proper divisors (its aliquot sum) s(n): 188005648200
• 81988247640 is an abundant number, because the sum of its proper divisors (188005648200) is greater than itself. Its abundance is 106017400560

Bases of 81988247640

• Binary: 1001100010110111000010110000001011000₂
• Hexadecimal: 0x1316E16058
• Base-36: 11NXOORC

Squares and roots of 81988247640

• 81988247640 squared (81988247640²) is 6722072751077965569600
• 81988247640 cubed (81988247640³) is 551130965369476318067758455744000
• The square root of 81988247640 is 286335.9000195399
• The cube root of 81988247640 is 4344.2739233709

Scales and comparisons

• 81,988,247,640 seconds is equal to 2,606 years, 50 weeks, 4 days, 1 hour, 14 minutes.
• To count from 1 to 81,988,247,640 would take you about five thousand, two hundred thirteen 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 81988247640 cubic inches would be around 362 feet tall.

Recreational maths with 81988247640

• 81988247640 backwards is 04674288918
• The number of decimal digits it has is: 11
• The sum of 81988247640's digits is 57
• More coming soon!