Base | Representation |
---|---|
bin | 100110000110110100… |
… | …1100000110100100000 |
3 | 21211020002220122122210 |
4 | 1030031221200310200 |
5 | 2320043320133033 |
6 | 101332125002120 |
7 | 5624623060251 |
oct | 1141551406440 |
9 | 254202818583 |
10 | 81833364768 |
11 | 3178388a181 |
12 | 13a399b3340 |
13 | 7941c0753c |
14 | 3d64458b28 |
15 | 21de417d63 |
hex | 130da60d20 |
81833364768 has 48 divisors (see below), whose sum is σ = 218018757600. Its totient is φ = 26870654976.
The previous prime is 81833364733. The next prime is 81833364779. The reversal of 81833364768 is 86746333818.
It is a tau number, because it is divible by the number of its divisors (48).
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, 6354993 + ... + 6367856.
It is an arithmetic number, because the mean of its divisors is an integer number (4542057450).
Almost surely, 281833364768 is an apocalyptic number.
It is an amenable number.
81833364768 is an abundant number, since it is smaller than the sum of its proper divisors (136185392832).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
81833364768 is a wasteful number, since it uses less digits than its factorization.
81833364768 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 12722929 (or 12722921 counting only the distinct ones).
The product of its digits is 13934592, while the sum is 57.
The spelling of 81833364768 in words is "eighty-one billion, eight hundred thirty-three million, three hundred sixty-four thousand, seven hundred sixty-eight".
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