81374498920

Names of 81374498920

• Cardinal: 81374498920 can be written as Eighty-one billion, three hundred seventy-four million, four hundred ninety-eight thousand, nine hundred twenty.

Scientific notation

• Scientific notation: 8.137449892 × 10¹⁰

Factors of 81374498920

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 394

Divisors of 81374498920

• Number of divisors d(n): 384
• Complete list of divisors:
  1 2 4 5 8 10 11 13 20 22 26 40 44 52 55 65 67 88 97 104 110 121 130 134 143 194 199 220 242 260 268 286 335 388 398 440 484 485 520 536 572 605 670 715 737 776 796 871 968 970 995 1067 1144 1210 1261 1340 1430 1474 1573 1592 1742 1940 1990 2134 2189 2420 2522 2587 2680 2860 2948 3146 3484 3685 3880 3980 4268 4355 4378 4840 5044 5174 5335 5720 5896 6292 6305 6499 6968 7370 7865 7960 8107 8536 8710 8756 9581 10088 10348 10670 10945 11737 12584 12610 12935 12998 13333 13871 14740 15730 16214 17420 17512 19162 19303 20696 21340 21890 23474 24079 25220 25870 25996 26666 27742 28457 29480 31460 32428 32495 34840 38324 38606 40535 42680 43780 46948 47905 48158 50440 51740 51992 53332 55484 56914 58685 62920 64856 64990 66665 69355 71489 76648 77212 81070 84487 87560 93896 95810 96316 96515 103480 105391 106664 110968 113828 117370 120395 129980 133330 138710 142285 142978 146663 152581 154424 162140 168974 173329 191620 192632 193030 210782 212333 227656 234740 240790 250939 259960 266660 277420 284570 285956 293326 305162 313027 324280 337948 346658 357445 383240 386060 421564 422435 424666 469480 481580 501878 526955 533320 554840 569140 571912 586652 610324 626054 675896 693316 714890 733315 762905 772120 786379 843128 844870 849332 866645 929357 963160 1003756 1053910 1061665 1138280 1173304 1220648 1252108 1254695 1293301 1386632 1429780 1466630 1525810 1565135 1572758 1613293 1689740 1698664 1733290 1858714 1906619 2007512 2107820 2123330 2335663 2504216 2509390 2586602 2760329 2859560 2933260 3051620 3130270 3145516 3226586 3379480 3466580 3717428 3813238 3931895 4215640 4246660 4646785 4671326 5018780 5173204 5520658 5866520 6103240 6260540 6291032 6453172 6466505 6933160 7434856 7626476 7863790 8066465 8493320 9293570 9342652 9533095 10037560 10222927 10346408 11041316 11678315 12521080 12906344 12933010 13801645 14226311 15252952 15727580 16132930 16812913 18587140 18685304 19066190 20445854 20972809 22082632 23356630 25866020 27603290 28452622 30363619 31455160 32265860 33625826 37174280 38132380 40891708 41945618 46713260 51114635 51732040 55206580 56905244 60727238 64531720 67251652 71131555 76264760 81783416 83891236 84064565 93426520 102229270 104864045 110413160 113810488 121454476 134503304 142263110 151818095 156489421 167782472 168129130 184942043 204458540 209728090 242908952 284526220 303636190 312978842 336258260 369884086 408917080 419456180 569052440 607272380 625957684 672516520 739768172 782447105 838912360 924710215 1214544760 1251915368 1479536344 1564894210 1849420430 2034362473 3129788420 3698840860 4068724946 6259576840 7397681720 8137449892 10171812365 16274899784 20343624730 40687249460 81374498920
• Sum of all divisors σ(n): 223350624000
• Sum of proper divisors (its aliquot sum) s(n): 141976125080
• 81374498920 is an abundant number, because the sum of its proper divisors (141976125080) is greater than itself. Its abundance is 60601626160

Bases of 81374498920

• Binary: 1001011110010010011000101000001101000₂
• Hexadecimal: 0x12F24C5068
• Base-36: 11DS9X7S

Squares and roots of 81374498920

• 81374498920 squared (81374498920²) is 6621809074481081166400
• 81374498920 cubed (81374498920³) is 538846395379806938935649140288000
• The square root of 81374498920 is 285262.1582334397
• The cube root of 81374498920 is 4333.4066199571

Scales and comparisons

• 81,374,498,920 seconds is equal to 2,587 years, 23 weeks, 5 days, 11 hours, 28 minutes, 40 seconds.
• To count from 1 to 81,374,498,920 would take you about five thousand, one hundred seventy-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 81374498920 cubic inches would be around 361.1 feet tall.

Recreational maths with 81374498920

• 81374498920 backwards is 02989447318
• 81374498920 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81374498920's digits is 55
• More coming soon!