Base | Representation |
---|---|
bin | 111111111110101111… |
… | …001010101101111100 |
3 | 20120022200221120021222 |
4 | 333332233022231330 |
5 | 2111143230140342 |
6 | 51320510412512 |
7 | 4651256542640 |
oct | 777657125574 |
9 | 216280846258 |
10 | 68698286972 |
11 | 27153434887 |
12 | 11392b01138 |
13 | 662a85ca63 |
14 | 3479baac20 |
15 | 1bc11d2ed2 |
hex | ffebcab7c |
68698286972 has 24 divisors (see below), whose sum is σ = 137410667520. Its totient is φ = 29439102960.
The previous prime is 68698286939. The next prime is 68698286981. The reversal of 68698286972 is 27968289686.
It is a junction number, because it is equal to n+sod(n) for n = 68698286896 and 68698286905.
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163697 + ... + 405207.
It is an arithmetic number, because the mean of its divisors is an integer number (5725444480).
Almost surely, 268698286972 is an apocalyptic number.
It is an amenable number.
68698286972 is an abundant number, since it is smaller than the sum of its proper divisors (68712380548).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
68698286972 is a wasteful number, since it uses less digits than its factorization.
68698286972 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 251681 (or 251679 counting only the distinct ones).
The product of its digits is 250822656, while the sum is 71.
The spelling of 68698286972 in words is "sixty-eight billion, six hundred ninety-eight million, two hundred eighty-six thousand, nine hundred seventy-two".
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