64509572 has 24 divisors (see below), whose sum is σ = 121867200. Its totient is φ = 29787296.

The previous prime is 64509569. The next prime is 64509587. The reversal of 64509572 is 27590546.

It is a happy number.

It is a super-2 number, since 2×64509572² = 8322969759246368, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9422 + ... + 14757.

It is an arithmetic number, because the mean of its divisors is an integer number (5077800).

Almost surely, 2^64509572 is an apocalyptic number.

It is an amenable number.

64509572 is a deficient number, since it is larger than the sum of its proper divisors (57357628).

64509572 is a wasteful number, since it uses less digits than its factorization.

64509572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24235 (or 24233 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 38.

The square root of 64509572 is about 8031.7851066871. The cubic root of 64509572 is about 401.0588031999.

The spelling of 64509572 in words is "sixty-four million, five hundred nine thousand, five hundred seventy-two".