64617625 has 16 divisors (see below), whose sum is σ = 81244800. Its totient is φ = 51308400.

The previous prime is 64617607. The next prime is 64617659. The reversal of 64617625 is 52671646.

It is a happy number.

It is not a de Polignac number, because 64617625 - 2¹⁷ = 64486553 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15516 + ... + 19234.

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

Almost surely, 2^64617625 is an apocalyptic number.

It is an amenable number.

64617625 is a deficient number, since it is larger than the sum of its proper divisors (16627175).

64617625 is a wasteful number, since it uses less digits than its factorization.

64617625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3873 (or 3863 counting only the distinct ones).

The product of its digits is 60480, while the sum is 37.

The square root of 64617625 is about 8038.5088791392. The cubic root of 64617625 is about 401.2826016865.

The spelling of 64617625 in words is "sixty-four million, six hundred seventeen thousand, six hundred twenty-five".