64064661525315 has 24 divisors (see below), whose sum is σ = 121140450885168. Its totient is φ = 31061654072640.

The previous prime is 64064661525223. The next prime is 64064661525329. The reversal of 64064661525315 is 51352516646046.

64064661525315 is a `hidden beast` number, since 6 + 4 + 0 + 6 + 4 + 6 + 615 + 2 + 5 + 3 + 15 = 666.

It is not a de Polignac number, because 64064661525315 - 2²⁷ = 64064527307587 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 64711778824 + ... + 64711779813.

It is an arithmetic number, because the mean of its divisors is an integer number (5047518786882).

Almost surely, 2^{64064661525315} is an apocalyptic number.

64064661525315 is a deficient number, since it is larger than the sum of its proper divisors (57075789359853).

64064661525315 is a wasteful number, since it uses less digits than its factorization.

64064661525315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129423558659 (or 129423558656 counting only the distinct ones).

The product of its (nonzero) digits is 15552000, while the sum is 54.

The spelling of 64064661525315 in words is "sixty-four trillion, sixty-four billion, six hundred sixty-one million, five hundred twenty-five thousand, three hundred fifteen".