64536648 has 32 divisors (see below), whose sum is σ = 176009760. Its totient is φ = 19556480.

The previous prime is 64536623. The next prime is 64536653. The reversal of 64536648 is 84663546.

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, 121965 + ... + 122492.

It is an arithmetic number, because the mean of its divisors is an integer number (5500305).

Almost surely, 2^64536648 is an apocalyptic number.

It is an amenable number.

64536648 is an abundant number, since it is smaller than the sum of its proper divisors (111473112).

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

64536648 is a wasteful number, since it uses less digits than its factorization.

64536648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244477 (or 244473 counting only the distinct ones).

The product of its digits is 414720, while the sum is 42.

The square root of 64536648 is about 8033.4704829233. The cubic root of 64536648 is about 401.1149062397.

The spelling of 64536648 in words is "sixty-four million, five hundred thirty-six thousand, six hundred forty-eight".