81790987140

Names of 81790987140

• Cardinal: 81790987140 can be written as Eighty-one billion, seven hundred ninety million, nine hundred eighty-seven thousand, one hundred forty.

Scientific notation

• Scientific notation: 8.179098714 × 10¹⁰

Factors of 81790987140

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 204

Divisors of 81790987140

• Number of divisors d(n): 576
• Complete list of divisors:
  1 2 3 4 5 6 9 10 12 15 18 20 27 30 31 36 37 43 45 54 60 62 74 83 86 90 93 108 111 124 129 135 148 155 166 172 180 185 186 215 222 249 258 270 279 310 332 333 370 372 387 415 430 444 465 498 516 540 555 558 620 645 666 740 747 774 830 837 860 930 996 999 1110 1116 1147 1161 1245 1290 1332 1333 1369 1395 1494 1548 1591 1660 1665 1674 1860 1935 1998 2220 2241 2294 2322 2490 2573 2580 2666 2738 2790 2988 3071 3182 3330 3348 3441 3569 3735 3870 3996 3999 4107 4185 4482 4588 4644 4773 4980 4995 5146 5332 5476 5580 5735 5805 6142 6364 6660 6665 6845 6882 7138 7470 7719 7740 7955 7998 8214 8370 8964 9213 9546 9990 10292 10323 10707 11205 11470 11610 11997 12284 12321 12865 13330 13690 13764 14276 14319 14940 15355 15438 15910 15996 16428 16740 17205 17845 18426 19092 19980 19995 20535 20646 21414 22410 22940 23157 23220 23865 23994 24642 25730 26660 27380 27639 28638 30710 30876 30969 31820 32121 34410 35690 35991 36852 36963 38595 39990 41070 41292 42439 42828 42957 44820 46065 46314 47730 47988 49284 49321 51460 51615 53535 55278 57276 58867 59985 61420 61605 61938 64242 68820 69471 71380 71595 71982 73926 77190 79980 82140 82917 84878 85914 92130 92628 95201 95460 96363 98642 103230 107070 110556 110639 113627 115785 117734 119970 123210 123876 127317 128484 132053 138195 138942 143190 143964 147852 147963 154380 154845 160605 165834 169756 171828 176601 179955 184260 184815 190402 192726 197284 206460 212195 214140 214785 221278 227254 231570 235468 239940 246420 246605 254634 264106 276390 277884 285603 286380 294335 295926 309690 321210 331668 331917 340881 347355 353202 359910 369630 380804 381951 385452 396159 414585 424390 429570 442556 443889 454508 463140 476005 481815 493210 509268 528212 529803 552780 553195 568135 571206 588670 591852 619380 636585 642420 660265 663834 681762 694710 706404 719820 739260 739815 763902 792318 829170 848780 856809 859140 883005 887778 952010 963630 986420 995751 1022643 1059606 1106390 1136270 1142412 1145853 1177340 1188477 1273170 1320530 1327668 1331667 1363524 1389420 1428015 1479630 1527804 1584636 1589409 1658340 1659585 1704405 1713618 1766010 1775556 1824877 1904020 1909755 1927260 1980795 1991502 2045286 2119212 2212780 2219445 2272540 2291706 2376954 2546340 2570427 2641060 2649015 2663334 2856030 2959260 2987253 3067929 3178818 3319170 3408810 3427236 3522437 3532020 3565431 3649754 3819510 3961590 3983004 4090572 4093643 4284045 4438890 4583412 4753908 4885961 4978755 5113215 5140854 5298030 5326668 5474631 5712060 5729265 5942385 5974506 6135858 6357636 6638340 6658335 6817620 7044874 7130862 7299508 7639020 7923180 7947045 8187286 8568090 8877780 9124385 9771922 9957510 10226430 10281708 10567311 10596060 10949262 11458530 11884770 11949012 12271716 12280929 12852135 13316670 14089748 14261724 14657883 14936265 15339645 15894090 16374572 16423893 17136180 17612185 17827155 18248770 19543844 19915020 20452860 20468215 21134622 21898524 22917060 23769540 24429805 24561858 25704270 26633340 27373155 29315766 29872530 30679290 31701933 31788180 32847786 35224370 35654310 36497540 36842787 40936430 42269244 43973649 48859610 49123716 49271679 51408540 52836555 54746310 58631532 59745060 61358580 61404645 63403866 65695572 70448740 71308620 73289415 73685574 81872860 82119465 87947298 95105799 97719220 98543358 105673110 109492620 110528361 122809290 126807732 131920947 146578830 147371148 151464791 158509665 164238930 175894596 184213935 190211598 197086716 211346220 219868245 221056722 245618580 246358395 263841894 293157660 302929582 317019330 328477860 368427870 380423196 439736490 442113444 454394373 475528995 492716790 527683788 552641805 605859164 634038660 659604735 736855740 757323955 879472980 908788746 951057990 985433580 1105283610 1319209470 1363183119 1514647910 1817577492 1902115980 2210567220 2271971865 2638418940 2726366238 3029295820 4089549357 4543943730 5452732476 6815915595 8179098714 9087887460 13631831190 16358197428 20447746785 27263662380 40895493570 81790987140
• Sum of all divisors σ(n): 279566622720
• Sum of proper divisors (its aliquot sum) s(n): 197775635580
• 81790987140 is an abundant number, because the sum of its proper divisors (197775635580) is greater than itself. Its abundance is 115984648440

Bases of 81790987140

• Binary: 1001100001011000111110110101110000100₂
• Hexadecimal: 0x130B1F6B84
• Base-36: 11KO8PL0

Squares and roots of 81790987140

• 81790987140 squared (81790987140²) is 6689765577335645379600
• 81790987140 cubed (81790987140³) is 547162530305474446706464018344000
• The square root of 81790987140 is 285991.2361244659
• The cube root of 81790987140 is 4340.7870747203

Scales and comparisons

• 81,790,987,140 seconds is equal to 2,600 years, 36 weeks, 2 days, 22 hours, 39 minutes.
• To count from 1 to 81,790,987,140 would take you about five thousand, two hundred one 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 81790987140 cubic inches would be around 361.7 feet tall.

Recreational maths with 81790987140

• 81790987140 backwards is 04178909718
• 81790987140 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81790987140's digits is 54
• More coming soon!