81642620400

Names of 81642620400

• Cardinal: 81642620400 can be written as Eighty-one billion, six hundred forty-two million, six hundred twenty thousand, four hundred.

Scientific notation

• Scientific notation: 8.16426204 × 10¹⁰

Factors of 81642620400

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 177

Divisors of 81642620400

• Number of divisors d(n): 540
• Complete list of divisors:
  1 2 3 4 5 6 8 10 11 12 15 16 20 22 24 25 30 33 40 44 48 50 53 55 60 66 75 80 88 100 103 106 110 120 121 132 150 159 165 176 200 206 212 220 240 242 264 265 275 300 309 318 330 363 400 412 424 440 484 515 528 530 550 583 600 605 618 636 660 726 795 824 825 848 880 968 1030 1060 1100 1133 1166 1200 1210 1236 1272 1320 1325 1452 1545 1590 1648 1650 1749 1815 1936 2060 2120 2200 2266 2332 2420 2472 2544 2575 2640 2650 2904 2915 3025 3090 3180 3300 3399 3498 3630 3975 4120 4240 4400 4532 4664 4840 4944 5150 5300 5459 5665 5808 5830 6050 6180 6360 6413 6600 6798 6996 7260 7725 7950 8240 8745 9064 9075 9328 9680 10300 10600 10609 10918 11330 11660 12100 12360 12463 12720 12826 13200 13596 13992 14520 14575 15450 15900 16377 16995 17490 18128 18150 19239 20600 21200 21218 21836 22660 23320 24200 24720 24926 25652 27192 27295 27984 28325 29040 29150 30900 31800 31827 32065 32754 33990 34980 36300 37389 38478 41200 42436 43672 43725 45320 46640 48400 49852 51304 53045 54384 54590 56650 58300 60049 61800 62315 63600 63654 64130 65508 67980 69960 72600 74778 76956 81885 84872 84975 87344 87450 90640 96195 99704 102608 106090 109180 113300 116600 116699 120098 123600 124630 127308 128260 131016 135960 136475 139920 145200 149556 153912 159135 160325 163770 169744 169950 174900 180147 186945 192390 199408 212180 218360 226600 233200 233398 240196 249260 254616 256520 262032 265225 271920 272950 299112 300245 307824 311575 318270 320650 327540 339900 349800 350097 360294 373890 384780 409425 424360 436720 453200 466796 480392 480975 498520 509232 513040 530450 545900 562277 583495 598224 600490 623150 636540 641300 655080 660539 679800 699600 700194 720588 747780 769560 795675 818850 848720 900735 933592 934725 960784 961950 997040 1060900 1091800 1124554 1166990 1200980 1246300 1273080 1282600 1283689 1310160 1321078 1359600 1400388 1441176 1495560 1501225 1539120 1591350 1637700 1686831 1750485 1801470 1867184 1869450 1923900 1981617 2121800 2183600 2249108 2333980 2401960 2492600 2546160 2565200 2567378 2642156 2800776 2811385 2882352 2917475 2991120 3002450 3182700 3275400 3302695 3373662 3500970 3602940 3738900 3847800 3851067 3963234 4243600 4498216 4503675 4667960 4803920 4985200 5134756 5284312 5601552 5622770 5834950 6004900 6185047 6365400 6418445 6550800 6605390 6747324 7001940 7205880 7477800 7695600 7702134 7926468 8434155 8752425 8996432 9007350 9335920 9908085 10269512 10568624 11245540 11669900 12009800 12370094 12730800 12836890 13210780 13494648 14003880 14056925 14411760 14955600 15404268 15852936 16513475 16868310 17504850 18014700 18555141 19255335 19816170 20539024 22491080 23339800 24019600 24740188 25673780 26421560 26989296 28007760 28113850 30808536 30925235 31705872 32092225 33026950 33736620 35009700 36029400 37110282 38510670 39632340 42170775 44982160 46679600 49480376 49540425 51347560 52843120 56227700 61617072 61850470 64184450 66053900 67473240 68035517 70019400 72058800 74220564 77021340 79264680 84341550 92775705 96276675 98960752 99080850 102695120 112455400 123700940 128368900 132107800 134946480 136071034 140038800 148441128 154042680 154626175 158529360 168683100 185551410 192553350 198161700 204106551 224910800 247401880 256737800 264215600 272142068 296882256 308085360 309252350 337366200 340177585 371102820 385106700 396323400 408213102 463878525 494803760 513475600 544284136 618504700 674732400 680355170 742205640 770213400 792646800 816426204 927757050 1020532755 1088568272 1237009400 1360710340 1484411280 1540426800 1632852408 1700887925 1855514100 2041065510 2474018800 2721420680 3265704816 3401775850 3711028200 4082131020 5102663775 5442841360 6803551700 7422056400 8164262040 10205327550 13607103400 16328524080 20410655100 27214206800 40821310200 81642620400
• Sum of all divisors σ(n): 295760304504
• Sum of proper divisors (its aliquot sum) s(n): 214117684104
• 81642620400 is an abundant number, because the sum of its proper divisors (214117684104) is greater than itself. Its abundance is 132475063704

Bases of 81642620400

• Binary: 1001100000010010001111000010111110000₂
• Hexadecimal: 0x13024785F0
• Base-36: 11I7WP2O

Squares and roots of 81642620400

• 81642620400 squared (81642620400²) is 6665517465778496160000
• 81642620400 cubed (81642620400³) is 544190312228123752473737664000000
• The square root of 81642620400 is 285731.7280247331
• The cube root of 81642620400 is 4338.1607941655

Scales and comparisons

• 81,642,620,400 seconds is equal to 2,595 years, 51 weeks, 17 hours, 40 minutes.
• To count from 1 to 81,642,620,400 would take you about five thousand, one hundred ninety-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 81642620400 cubic inches would be around 361.5 feet tall.

Recreational maths with 81642620400

• 81642620400 backwards is 00402624618
• 81642620400 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81642620400's digits is 33
• More coming soon!