81405621360

Names of 81405621360

• Cardinal: 81405621360 can be written as Eighty-one billion, four hundred five million, six hundred twenty-one thousand, three hundred sixty.

Scientific notation

• Scientific notation: 8.140562136 × 10¹⁰

Factors of 81405621360

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 7544

Divisors of 81405621360

• Number of divisors d(n): 480
• Complete list of divisors:
  1 2 3 4 5 6 7 8 9 10 12 14 15 16 18 20 21 24 28 30 35 36 40 41 42 45 48 53 56 60 63 70 72 80 82 84 90 105 106 112 120 123 126 140 144 159 164 168 180 205 210 212 240 246 252 265 280 287 315 318 328 336 360 369 371 410 420 424 477 492 504 530 560 574 615 630 636 656 720 738 742 795 820 840 848 861 954 984 1008 1060 1113 1148 1230 1260 1272 1435 1476 1484 1590 1640 1680 1722 1845 1855 1908 1968 2120 2173 2226 2296 2385 2460 2520 2544 2583 2870 2952 2968 3180 3280 3339 3444 3690 3710 3816 4240 4305 4346 4452 4592 4770 4920 5040 5166 5565 5740 5904 5936 6360 6519 6678 6888 7380 7420 7433 7632 8610 8692 8904 9540 9840 10332 10865 11130 11480 12720 12915 13038 13356 13776 14760 14840 14866 15211 16695 17220 17384 17808 19080 19557 20664 21730 22260 22299 22960 25830 26076 26712 29520 29680 29732 30422 32595 33390 34440 34768 37165 38160 39114 41328 43460 44520 44598 45633 51660 52031 52152 53424 59464 60844 65190 66780 66897 68880 74330 76055 78228 86920 89040 89196 91266 97785 103320 104062 104304 111495 118928 121688 130380 133560 133794 136899 148660 152110 156093 156456 173840 178392 182532 195570 206640 208124 222990 228165 243376 260155 260760 267120 267588 273798 297320 304220 304753 312186 312912 334485 356784 365064 391140 393949 416248 445980 456330 468279 520310 521520 535176 547596 594640 608440 609506 624372 668970 684495 730128 780465 782280 787898 832496 891960 912660 914259 936558 1040620 1070352 1095192 1181847 1216880 1219012 1248744 1337940 1368990 1523765 1560930 1564560 1575796 1783920 1825320 1828518 1873116 1969745 2081240 2133271 2190384 2341395 2363694 2438024 2497488 2675880 2737980 2742777 2757643 3047530 3121860 3151592 3545541 3650640 3657036 3746232 3939490 4162480 4266542 4571295 4682790 4727388 4876048 5351760 5475960 5485554 5515286 5909235 6095060 6243720 6303184 6399813 7091082 7314072 7492464 7878980 8272929 8533084 9142590 9365580 9454776 10666355 10951920 10971108 11030572 11818470 12190120 12487440 12799626 13713885 13788215 14182164 14628144 15757960 16151909 16545858 17066168 17727705 18285180 18731160 18909552 19199439 21332710 21942216 22061144 23636940 24380240 24818787 25599252 27427770 27576430 28364328 31515920 31999065 32303818 33091716 34132336 35455410 36570360 37462320 38398878 41364645 42665420 43884432 44122288 47273880 48455727 49637574 51198504 54855540 55152860 56728656 63998130 64607636 66183432 70910820 73140720 76797756 80759545 82729290 85330840 94547760 95997195 96911454 99275148 102397008 109711080 110305720 113063363 124093935 127996260 129215272 132366864 141821640 145367181 153595512 161519090 165458580 170661680 191994390 193822908 198550296 219422160 220611440 226126726 242278635 248187870 255992520 258430544 283643280 290734362 307191024 323038180 330917160 339190089 383988780 387645816 397100592 452253452 484557270 496375740 511985040 565316815 581468724 646076360 661834320 678380178 726835905 767977560 775291632 904506904 969114540 992751480 1017570267 1130633630 1162937448 1292152720 1356760356 1453671810 1535955120 1695950445 1809013808 1938229080 1985502960 2035140534 2261267260 2325874896 2713520712 2907343620 3391900890 3876458160 4070281068 4522534520 5087851335 5427041424 5814687240 6783801780 8140562136 9045069040 10175702670 11629374480 13567603560 16281124272 20351405340 27135207120 40702810680 81405621360
• Sum of all divisors σ(n): 326145875328
• Sum of proper divisors (its aliquot sum) s(n): 244740253968
• 81405621360 is an abundant number, because the sum of its proper divisors (244740253968) is greater than itself. Its abundance is 163334632608

Bases of 81405621360

• Binary: 1001011110100001001110011010001110000₂
• Hexadecimal: 0x12F4273470
• Base-36: 11EASZG0

Squares and roots of 81405621360

• 81405621360 squared (81405621360²) is 6626875189007688249600
• 81405621360 cubed (81405621360³) is 539464892436338303775858771456000
• The square root of 81405621360 is 285316.7036119687
• The cube root of 81405621360 is 4333.9590002047

Scales and comparisons

• 81,405,621,360 seconds is equal to 2,588 years, 23 weeks, 1 day, 16 hours, 36 minutes.
• To count from 1 to 81,405,621,360 would take you about five thousand, one 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 81405621360 cubic inches would be around 361.2 feet tall.

Recreational maths with 81405621360

• 81405621360 backwards is 06312650418
• 81405621360 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81405621360's digits is 36
• More coming soon!