64509025 has 24 divisors (see below), whose sum is σ = 92932544. Its totient is φ = 43502400.

The previous prime is 64509013. The next prime is 64509041. The reversal of 64509025 is 52090546.

It is not a de Polignac number, because 64509025 - 2⁵ = 64508993 is a prime.

It is a super-2 number, since 2×64509025² = 8322828612901250, which contains 22 as substring.

It is a Duffinian 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, 7654 + ... + 13696.

Almost surely, 2^64509025 is an apocalyptic number.

It is an amenable number.

64509025 is a deficient number, since it is larger than the sum of its proper divisors (28423519).

64509025 is a wasteful number, since it uses less digits than its factorization.

64509025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6121 (or 6116 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 64509025 is about 8031.7510544090. The cubic root of 64509025 is about 401.0576696225.

The spelling of 64509025 in words is "sixty-four million, five hundred nine thousand, twenty-five".