81438689720472
81,438,689,720,472 is an even composite number composed of six prime numbers multiplied together.
81438689720472 is an even composite number. It is composed of six distinct prime numbers multiplied together. It has a total of one hundred ninety-two divisors.
Prime factorization of 81438689720472:
23 × 3 × 72 × 31 × 193 × 11574559
(2 × 2 × 2 × 3 × 7 × 7 × 31 × 193 × 11574559)See below for interesting mathematical facts about the number 81438689720472 from the Numbermatics database.
Names of 81438689720472
- Cardinal: 81438689720472 can be written as Eighty-one trillion, four hundred thirty-eight billion, six hundred eighty-nine million, seven hundred twenty thousand, four hundred seventy-two.
Scientific notation
- Scientific notation: 8.1438689720472 × 1013
Factors of 81438689720472
Divisors of 81438689720472
- Number of divisors d(n): 192
-
Complete list of divisors:
1 2 3 4 6 7 8 12 14 21 24 28 31 42 49 56 62 84 93 98 124 147 168 186 193 196 217 248 294 372 386 392 434 579 588 651 744 772 868 1158 1176 1302 1351 1519 1544 1736 2316 2604 2702 3038 4053 4557 4632 5208 5404 5983 6076 8106 9114 9457 10808 11966 12152 16212 17949 18228 18914 23932 28371 32424 35898 36456 37828 41881 47864 56742 71796 75656 83762 113484 125643 143592 167524 226968 251286 293167 335048 502572 586334 879501 1005144 1172668 1759002 2345336 3518004 7036008 11574559 23149118 34723677 46298236 69447354 81021913 92596472 138894708 162043826 243065739 277789416 324087652 358811329 486131478 567153391 648175304 717622658 972262956 1076433987 1134306782 1435245316 1701460173 1944525912 2152867974 2233889887 2268613564 2511679303 2870490632 3402920346 4305735948 4467779774 4537227128 5023358606 6701669661 6805840692 7535037909 8611471896 8935559548 10046717212 13403339322 13611681384 15070075818 15637229209 17581755121 17871119096 20093434424 26806678644 30140151636 31274458418 35163510242 46911687627 52745265363 53613357288 60280303272 62548916836 69250586497 70327020484 93823375254 105490530726 109460604463 125097833672 138501172994 140654040968 187646750508 207751759491 210981061452 218921208926 277002345988 328381813389 375293501016 415503518982 421962122904 437842417852 484754105479 554004691976 656763626778 831007037964 875684835704 969508210958 1313527253556 1454262316437 1662014075928 1939016421916 2627054507112 2908524632874 3393278738353 3878032843832 5817049265748 6786557476706 10179836215059 11634098531496 13573114953412 20359672430118 27146229906824 40719344860236 81438689720472
- Sum of all divisors σ(n): 245743650201600
- Sum of proper divisors (its aliquot sum) s(n): 164304960481128
- 81438689720472 is an abundant number, because the sum of its proper divisors (164304960481128) is greater than itself. Its abundance is 82866270760656
Bases of 81438689720472
- Binary: 100101000010001011011000010101111111000100110002
- Hexadecimal: 0x4A116C2BF898
- Base-36: SV8F16AOO
Squares and roots of 81438689720472
- 81438689720472 squared (814386897204722) is 6632260183387311801495902784
- 81438689720472 cubed (814386897204723) is 540122579220320011193477869847766246594048
-
The
square root of 81438689720472 is 9024338.7414520295 -
The
cube root of 81438689720472 is 43345.4576360233
Scales and comparisons
How big is 81438689720472?- 81,438,689,720,472 seconds is equal to 2,589,498 years, 22 weeks, 1 day, 7 hours, 41 minutes, 12 seconds.
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To count from 1 to 81,438,689,720,472 would take you about six million, four hundred seventy-three thousand, seven hundred forty-six 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 81438689720472 cubic inches would be around 3612.1 feet tall.
Recreational maths with 81438689720472
- 81438689720472 backwards is 27402798683418
- The number of decimal digits it has is: 14
- The sum of 81438689720472's digits is 69
- More coming soon!
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