64520604 has 48 divisors (see below), whose sum is σ = 167946240. Its totient is φ = 21420720.

The previous prime is 64520591. The next prime is 64520609. The reversal of 64520604 is 40602546.

It is a happy number.

64520604 is a `hidden beast` number, since 6 + 4 + 52 + 0 + 604 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64520609) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29509 + ... + 31619.

It is an arithmetic number, because the mean of its divisors is an integer number (3498880).

Almost surely, 2^64520604 is an apocalyptic number.

It is an amenable number.

64520604 is an abundant number, since it is smaller than the sum of its proper divisors (103425636).

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

64520604 is a wasteful number, since it uses less digits than its factorization.

64520604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2407 (or 2399 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 64520604 is about 8032.4718486902. The cubic root of 64520604 is about 401.0816640374.

The spelling of 64520604 in words is "sixty-four million, five hundred twenty thousand, six hundred four".