161085140
161,085,140 is an even composite number composed of five prime numbers multiplied together.
161085140 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of seventy-two divisors.
Prime factorization of 161085140:
22 × 5 × 292 × 61 × 157
(2 × 2 × 5 × 29 × 29 × 61 × 157)See below for interesting mathematical facts about the number 161085140 from the Numbermatics database.
Names of 161085140
- Cardinal: 161085140 can be written as One hundred sixty-one million, eighty-five thousand, one hundred forty.
Scientific notation
- Scientific notation: 1.6108514 × 108
Factors of 161085140
Divisors of 161085140
- Number of divisors d(n): 72
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Complete list of divisors:
1 2 4 5 10 20 29 58 61 116 122 145 157 244 290 305 314 580 610 628 785 841 1220 1570 1682 1769 3140 3364 3538 4205 4553 7076 8410 8845 9106 9577 16820 17690 18212 19154 22765 35380 38308 45530 47885 51301 91060 95770 102602 132037 191540 205204 256505 264074 277733 513010 528148 555466 660185 1026020 1110932 1320370 1388665 2640740 2777330 5554660 8054257 16108514 32217028 40271285 80542570 161085140
- Sum of all divisors σ(n): 358357272
- Sum of proper divisors (its aliquot sum) s(n): 197272132
- 161085140 is an abundant number, because the sum of its proper divisors (197272132) is greater than itself. Its abundance is 36186992
Bases of 161085140
- Binary: 10011001100111110110110101002
- Hexadecimal: 0x999F6D4
- Base-36: 2NWM38
Squares and roots of 161085140
- 161085140 squared (1610851402) is 25948422328819600
- 161085140 cubed (1610851403) is 4179905243617031300744000
-
The
square root of 161085140 is 12691.9320830203 -
The
cube root of 161085140 is 544.1080604611
Scales and comparisons
How big is 161085140?- 161,085,140 seconds is equal to 5 years, 6 weeks, 2 days, 9 hours, 52 minutes, 20 seconds.
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To count from 1 to 161,085,140 would take you about seven 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 161085140 cubic inches would be around 45.3 feet tall.
Recreational maths with 161085140
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