64939025 has 12 divisors (see below), whose sum is σ = 80886192. Its totient is φ = 51717840.

The previous prime is 64939019. The next prime is 64939067. The reversal of 64939025 is 52093946.

It is not a de Polignac number, because 64939025 - 2⁶ = 64938961 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 64939025.

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, 47 + ... + 11396.

It is an arithmetic number, because the mean of its divisors is an integer number (6740516).

Almost surely, 2^64939025 is an apocalyptic number.

It is an amenable number.

64939025 is a deficient number, since it is larger than the sum of its proper divisors (15947167).

64939025 is a wasteful number, since it uses less digits than its factorization.

64939025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11680 (or 11675 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 38.

The square root of 64939025 is about 8058.4753520750. The cubic root of 64939025 is about 401.9468115236.

The spelling of 64939025 in words is "sixty-four million, nine hundred thirty-nine thousand, twenty-five".