Base | Representation |
---|---|
bin | 111111011011101111… |
… | …010001001101000100 |
3 | 20111210210001221021000 |
4 | 333123233101031010 |
5 | 2103442421022410 |
6 | 51142333253300 |
7 | 4630566614403 |
oct | 773357211504 |
9 | 214723057230 |
10 | 68111110980 |
11 | 26981a45870 |
12 | 1124a334230 |
13 | 6566004243 |
14 | 3421c0163a |
15 | 1b89899dc0 |
hex | fdbbd1344 |
68111110980 has 192 divisors, whose sum is σ = 244763285760. Its totient is φ = 15540480000.
The previous prime is 68111110961. The next prime is 68111110981. The reversal of 68111110980 is 8901111186.
It is a Harshad number since it is a multiple of its sum of digits (36).
It is not an unprimeable number, because it can be changed into a prime (68111110981) by changing a digit.
It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 236271 + ... + 438230.
It is an arithmetic number, because the mean of its divisors is an integer number (1274808780).
Almost surely, 268111110980 is an apocalyptic number.
68111110980 is a gapful number since it is divisible by the number (60) formed by its first and last digit.
It is an amenable number.
68111110980 is an abundant number, since it is smaller than the sum of its proper divisors (176652174780).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
68111110980 is a wasteful number, since it uses less digits than its factorization.
68111110980 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 674547 (or 674539 counting only the distinct ones).
The product of its (nonzero) digits is 3456, while the sum is 36.
The spelling of 68111110980 in words is "sixty-eight billion, one hundred eleven million, one hundred ten thousand, nine hundred eighty".
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