64536564 has 24 divisors (see below), whose sum is σ = 150750880. Its totient is φ = 21488544.

The previous prime is 64536557. The next prime is 64536569. The reversal of 64536564 is 46563546.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64536569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11082 + ... + 15870.

Almost surely, 2^64536564 is an apocalyptic number.

It is an amenable number.

64536564 is an abundant number, since it is smaller than the sum of its proper divisors (86214316).

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

64536564 is a wasteful number, since it uses less digits than its factorization.

64536564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5919 (or 5917 counting only the distinct ones).

The product of its digits is 259200, while the sum is 39.

The square root of 64536564 is about 8033.4652547951. The cubic root of 64536564 is about 401.1147322111.

The spelling of 64536564 in words is "sixty-four million, five hundred thirty-six thousand, five hundred sixty-four".