Base | Representation |
---|---|
bin | 111111111110011001… |
… | …110110000111101100 |
3 | 20120022022102121002110 |
4 | 333332121312013230 |
5 | 2111140312310310 |
6 | 51320150524020 |
7 | 4651161203223 |
oct | 777631660754 |
9 | 216268377073 |
10 | 68692697580 |
11 | 27150267451 |
12 | 11391066610 |
13 | 6629653920 |
14 | 3479153cba |
15 | 1bc097bd20 |
hex | ffe6761ec |
68692697580 has 96 divisors (see below), whose sum is σ = 209270545344. Its totient is φ = 16734633984.
The previous prime is 68692697569. The next prime is 68692697597. The reversal of 68692697580 is 8579629686.
It is an unprimeable number.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 378297 + ... + 529616.
It is an arithmetic number, because the mean of its divisors is an integer number (2179901514).
Almost surely, 268692697580 is an apocalyptic number.
68692697580 is a gapful number since it is divisible by the number (60) formed by its first and last digit.
It is an amenable number.
68692697580 is an abundant number, since it is smaller than the sum of its proper divisors (140577847764).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
68692697580 is a wasteful number, since it uses less digits than its factorization.
68692697580 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 908035 (or 908033 counting only the distinct ones).
The product of its (nonzero) digits is 78382080, while the sum is 66.
The spelling of 68692697580 in words is "sixty-eight billion, six hundred ninety-two million, six hundred ninety-seven thousand, five hundred eighty".
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