8636643460656 has 40 divisors (see below), whose sum is σ = 24790365490160. Its totient is φ = 2878881153408.

The previous prime is 8636643460609. The next prime is 8636643460723. The reversal of 8636643460656 is 6560643466368.

8636643460656 is a `hidden beast` number, since 8 + 63 + 6 + 64 + 3 + 460 + 6 + 56 = 666.

It is a super-2 number, since 2×8636643460656² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 8636643460593 and 8636643460602.

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, 9996114685 + ... + 9996115548.

It is an arithmetic number, because the mean of its divisors is an integer number (619759137254).

Almost surely, 2^{8636643460656} is an apocalyptic number.

It is an amenable number.

8636643460656 is an abundant number, since it is smaller than the sum of its proper divisors (16153722029504).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8636643460656 is a wasteful number, since it uses less digits than its factorization.

8636643460656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19992230250 (or 19992230238 counting only the distinct ones).

The product of its (nonzero) digits is 268738560, while the sum is 63.

The spelling of 8636643460656 in words is "eight trillion, six hundred thirty-six billion, six hundred forty-three million, four hundred sixty thousand, six hundred fifty-six".