64520575 has 12 divisors (see below), whose sum is σ = 91435120. Its totient is φ = 44242560.

The previous prime is 64520569. The next prime is 64520587. The reversal of 64520575 is 57502546.

It is not a de Polignac number, because 64520575 - 2³ = 64520567 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64520575.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 184170 + ... + 184519.

Almost surely, 2^64520575 is an apocalyptic number.

64520575 is a deficient number, since it is larger than the sum of its proper divisors (26914545).

64520575 is a wasteful number, since it uses less digits than its factorization.

64520575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368706 (or 368701 counting only the distinct ones).

The product of its (nonzero) digits is 42000, while the sum is 34.

The square root of 64520575 is about 8032.4700435171. The cubic root of 64520575 is about 401.0816039461.

The spelling of 64520575 in words is "sixty-four million, five hundred twenty thousand, five hundred seventy-five".