81009828900

Names of 81009828900

• Cardinal: 81009828900 can be written as Eighty-one billion, nine million, eight hundred twenty-eight thousand, nine hundred.

Scientific notation

• Scientific notation: 8.10098289 × 10¹⁰

Factors of 81009828900

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 6958

Divisors of 81009828900

• Number of divisors d(n): 648
• Complete list of divisors:
  1 2 3 4 5 6 7 9 10 11 12 13 14 15 18 20 21 22 25 26 28 30 33 35 36 39 42 44 45 50 52 55 60 63 65 66 70 75 77 78 84 90 91 99 100 105 110 117 126 130 132 140 143 150 154 156 165 169 175 180 182 195 198 210 220 225 231 234 252 260 273 275 286 300 308 315 325 330 338 350 364 385 390 396 420 429 450 455 462 468 495 507 525 546 550 572 585 630 650 660 676 693 700 715 770 780 819 825 845 858 900 910 924 975 990 1001 1014 1050 1092 1100 1155 1170 1183 1260 1287 1300 1365 1386 1430 1521 1540 1575 1638 1650 1690 1716 1820 1859 1925 1950 1980 2002 2028 2100 2145 2275 2310 2340 2366 2475 2535 2574 2730 2772 2860 2925 3003 3042 3150 3276 3300 3380 3465 3549 3575 3718 3850 3900 4004 4095 4225 4290 4550 4620 4732 4950 5005 5070 5148 5460 5577 5775 5850 5915 6006 6084 6300 6435 6825 6917 6930 7098 7150 7436 7605 7700 8190 8450 8580 9009 9100 9295 9900 10010 10140 10647 10725 11154 11550 11700 11830 12012 12675 12870 13013 13650 13834 13860 14196 14300 15015 15210 16380 16731 16900 17325 17745 18018 18590 20020 20475 20751 21294 21450 22308 23100 23660 25025 25350 25740 26026 27300 27668 27885 29575 30030 30420 32175 33462 34585 34650 35490 36036 37180 38025 39039 40950 41502 42588 42900 45045 46475 48419 50050 50700 52052 53235 55770 59150 60060 62253 64350 65065 66924 69170 69300 70980 75075 76050 76087 78078 81900 83004 83655 88725 89921 90090 92950 96838 100100 103755 106470 111540 117117 118300 124506 128700 130130 138340 139425 145257 150150 152100 152174 156156 167310 172925 177450 179842 180180 185900 193676 195195 207510 212940 225225 228261 234234 242095 249012 260260 266175 269763 278850 290514 300300 304348 311265 325325 334620 345850 354900 359684 380435 390390 415020 418275 435771 449605 450450 456522 468468 484190 518775 532350 532609 539526 557700 581028 585585 622530 629447 650650 684783 691700 726285 760870 780780 809289 836550 871542 899210 900900 913044 968380 975975 989131 1037550 1064700 1065218 1079052 1141305 1168973 1171170 1210475 1245060 1258894 1301300 1348815 1369566 1452570 1521740 1556325 1597827 1618578 1673100 1743084 1798420 1888341 1902175 1951950 1978262 2075100 2130436 2178855 2248025 2282610 2337946 2342340 2420950 2517788 2663045 2697630 2739132 2905140 2927925 2967393 3112650 3147235 3195654 3237156 3423915 3506919 3631425 3776682 3804350 3903900 3956524 4046445 4357710 4496050 4565220 4675892 4793481 4841900 4945655 5326090 5395260 5665023 5706525 5844865 5855850 5934786 6225300 6294470 6391308 6744075 6847830 6923917 7013838 7262850 7553364 7608700 7989135 8092890 8182811 8715420 8902179 8992100 9441705 9586962 9891310 10520757 10652180 10894275 11330046 11413050 11689730 11711700 11869572 12588940 12858703 13315225 13488150 13695660 13847834 14027676 14525700 14836965 15736175 15978270 16185780 16365622 17119575 17534595 17804358 18883410 19173924 19782620 20232225 20771751 21041514 21788550 22660092 22826100 23379460 23967405 24548433 24728275 25717406 26630450 26976300 27695668 28325115 29224325 29673930 31472350 31956540 32731244 34239150 34619585 35069190 35608716 37766820 38576109 39945675 40464450 40914055 41543502 42083028 43577100 44510895 47208525 47934810 49096866 49456550 51434812 52603785 53260900 56650230 58448650 59347860 62315253 62944700 64293515 68478300 69239170 70138380 73645299 74184825 77152218 79891350 80928900 81828110 83087004 87672975 89021790 90010921 94417050 95869620 98193732 98913100 103858755 105207570 113300460 115728327 116897300 119837025 122742165 124630506 128587030 138478340 141625575 147290598 148369650 154304436 159782700 163656220 173097925 175345950 178043580 180021842 188834100 192880545 204570275 207717510 210415140 222554475 231456654 239674050 245484330 249261012 257174060 263018925 270032763 283251150 294581196 296739300 311576265 321467575 346195850 350691900 360043684 368226495 385761090 409140550 415435020 445108950 450054605 462913308 479348100 490968660 519293775 526037850 540065526 566502300 578641635 613710825 623152530 642935150 692391700 736452990 771522180 810098289 818281100 890217900 900109210 964402725 1038587550 1052075700 1080131052 1157283270 1227421650 1246305060 1285870300 1350163815 1472905980 1557881325 1620196578 1800218420 1841132475 1928805450 2077175100 2250273025 2314566540 2454843300 2700327630 2893208175 3115762650 3240393156 3682264950 3857610900 4050491445 4500546050 5400655260 5786416350 6231525300 6750819075 7364529900 8100982890 9001092100 11572832700 13501638150 16201965780 20252457225 27003276300 40504914450 81009828900
• Sum of all divisors σ(n): 342851431104
• Sum of proper divisors (its aliquot sum) s(n): 261841602204
• 81009828900 is an abundant number, because the sum of its proper divisors (261841602204) is greater than itself. Its abundance is 180831773304

Bases of 81009828900

• Binary: 1001011011100100011111110010000100100₂
• Hexadecimal: 0x12DC8FE424
• Base-36: 117R5S10

Squares and roots of 81009828900

• 81009828900 squared (81009828900²) is 6562592378407275210000
• 81009828900 cubed (81009828900³) is 531634485715217419277311569000000
• The square root of 81009828900 is 284622.2565085169
• The cube root of 81009828900 is 4326.9237128167

Scales and comparisons

• 81,009,828,900 seconds is equal to 2,575 years, 44 weeks, 5 days, 18 hours, 15 minutes.
• To count from 1 to 81,009,828,900 would take you about five thousand, one hundred fifty-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 81009828900 cubic inches would be around 360.6 feet tall.

Recreational maths with 81009828900

• 81009828900 backwards is 00982890018
• 81009828900 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81009828900's digits is 45
• More coming soon!