81501613644720

Names of 81501613644720

• Cardinal: 81501613644720 can be written as Eighty-one trillion, five hundred one billion, six hundred thirteen million, six hundred forty-four thousand, seven hundred twenty.

Scientific notation

• Scientific notation: 8.150161364472 × 10¹³

Factors of 81501613644720

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 1819158

Divisors of 81501613644720

• Number of divisors d(n): 320
• Complete list of divisors:
  1 2 3 4 5 6 8 10 12 15 16 19 20 24 30 31 38 40 48 57 60 62 76 80 93 95 114 120 124 152 155 186 190 228 240 248 285 304 310 317 372 380 456 465 496 570 589 620 634 744 760 912 930 951 1140 1178 1240 1268 1488 1520 1585 1767 1860 1902 2280 2356 2480 2536 2945 3170 3534 3720 3804 4560 4712 4755 5072 5890 6023 6340 7068 7440 7608 8835 9424 9510 9827 11780 12046 12680 14136 15216 17670 18069 19020 19654 23560 24092 25360 28272 29481 30115 35340 36138 38040 39308 47120 48184 49135 58962 60230 70680 72276 76080 78616 90345 96368 98270 117924 120460 141360 144552 147405 157232 180690 186713 196540 235848 240920 289104 294810 361380 373426 393080 471696 481840 560139 589620 722760 746852 786160 933565 1120278 1179240 1445520 1493704 1818781 1867130 2240556 2358480 2800695 2987408 3637562 3734260 4481112 5456343 5601390 7275124 7468520 8962224 9093905 10912686 11202780 14550248 14937040 18187810 21825372 22405560 27281715 29100496 34556839 36375620 43650744 44811120 54563430 56382211 69113678 72751240 87301488 103670517 109126860 112764422 138227356 145502480 169146633 172784195 207341034 218253720 225528844 276454712 281911055 338293266 345568390 414682068 436507440 451057688 518352585 552909424 563822110 576553577 676586532 691136780 829364136 845733165 902115376 1036705170 1071262009 1127644220 1153107154 1353173064 1382273560 1658728272 1691466330 1729660731 2073410340 2142524018 2255288440 2306214308 2706346128 2764547120 2882767885 3213786027 3382932660 3459321462 4146820680 4285048036 4510576880 4612428616 5356310045 5765535770 6427572054 6765865320 6918642924 8293641360 8570096072 8648303655 9224857232 10712620090 10954517963 11531071540 12855144108 13531730640 13837285848 16068930135 17140192144 17296607310 17873160887 21425240180 21909035926 23062143080 25710288216 27674571696 32137860270 32863553889 34593214620 35746321774 42850480360 43818071852 46124286160 51420576432 53619482661 54772589815 64275720540 65727107778 69186429240 71492643548 85700960720 87636143704 89365804435 107238965322 109545179630 128551441080 131454215556 138372858480 142985287096 164317769445 175272287408 178731608870 214477930644 219090359260 257102882160 262908431112 268097413305 285970574192 328635538890 339590056853 357463217740 428955861288 438180718520 525816862224 536194826610 657271077780 679180113706 714926435480 857911722576 876361437040 1018770170559 1072389653220 1314542155560 1358360227412 1429852870960 1697950284265 2037540341118 2144779306440 2629084311120 2716720454824 3395900568530 4075080682236 4289558612880 5093850852795 5433440909648 6791801137060 8150161364472 10187701705590 13583602274120 16300322728944 20375403411180 27167204548240 40750806822360 81501613644720
• Sum of all divisors σ(n): 275397933404160
• Sum of proper divisors (its aliquot sum) s(n): 193896319759440
• 81501613644720 is an abundant number, because the sum of its proper divisors (193896319759440) is greater than itself. Its abundance is 112394706114720

Bases of 81501613644720

• Binary: 10010100010000000010010101110101101101110110000₂
• Hexadecimal: 0x4A2012BADBB0
• Base-36: SW1BOGDDC

Squares and roots of 81501613644720

• 81501613644720 squared (81501613644720²) is 6642513026693209282383878400
• 81501613644720 cubed (81501613644720³) is 541375530331569611230504463334393282048000
• The square root of 81501613644720 is 9027824.4137067709
• The cube root of 81501613644720 is 43356.6184415363

Scales and comparisons

• 81,501,613,644,720 seconds is equal to 2,591,499 years, 11 weeks, 11 hours, 32 minutes.
• To count from 1 to 81,501,613,644,720 would take you about six million, four hundred seventy-eight thousand, seven hundred forty-eight 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 81501613644720 cubic inches would be around 3613.1 feet tall.

Recreational maths with 81501613644720

• 81501613644720 backwards is 02744631610518
• 81501613644720 is a Harshad number.
• The number of decimal digits it has is: 14
• The sum of 81501613644720's digits is 48
• More coming soon!