64504900 has 18 divisors (see below), whose sum is σ = 139975850. Its totient is φ = 25801920.

The previous prime is 64504889. The next prime is 64504901. The reversal of 64504900 is 940546.

It can be written as a sum of positive squares in 3 ways, for example, as 7441984 + 57062916 = 2728^2 + 7554^2 .

It is not an unprimeable number, because it can be changed into a prime (64504901) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 322425 + ... + 322624.

Almost surely, 2^64504900 is an apocalyptic number.

It is an amenable number.

64504900 is an abundant number, since it is smaller than the sum of its proper divisors (75470950).

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

64504900 is a wasteful number, since it uses less digits than its factorization.

64504900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645063 (or 645056 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 64504900 is about 8031.4942569861. The cubic root of 64504900 is about 401.0491209574.

The spelling of 64504900 in words is "sixty-four million, five hundred four thousand, nine hundred".