64561525 has 24 divisors (see below), whose sum is σ = 96313280. Its totient is φ = 41938560.

The previous prime is 64561501. The next prime is 64561531. The reversal of 64561525 is 52516546.

It is not a de Polignac number, because 64561525 - 2⁷ = 64561397 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6384 + ... + 13033.

Almost surely, 2^64561525 is an apocalyptic number.

It is an amenable number.

64561525 is a deficient number, since it is larger than the sum of its proper divisors (31751755).

64561525 is a wasteful number, since it uses less digits than its factorization.

64561525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19453 (or 19448 counting only the distinct ones).

The product of its digits is 36000, while the sum is 34.

The square root of 64561525 is about 8035.0186683044. The cubic root of 64561525 is about 401.1664389939.

The spelling of 64561525 in words is "sixty-four million, five hundred sixty-one thousand, five hundred twenty-five".