64564544 has 28 divisors (see below), whose sum is σ = 139769088. Its totient is φ = 29347200.

The previous prime is 64564517. The next prime is 64564579. The reversal of 64564544 is 44546546.

It is a junction number, because it is equal to n+sod(n) for n = 64564498 and 64564507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45152 + ... + 46559.

Almost surely, 2^64564544 is an apocalyptic number.

64564544 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

64564544 is an abundant number, since it is smaller than the sum of its proper divisors (75204544).

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

64564544 is a wasteful number, since it uses less digits than its factorization.

64564544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91734 (or 91724 counting only the distinct ones).

The product of its digits is 230400, while the sum is 38.

The square root of 64564544 is about 8035.2065312598. The cubic root of 64564544 is about 401.1726919575.

The spelling of 64564544 in words is "sixty-four million, five hundred sixty-four thousand, five hundred forty-four".