64536725 has 24 divisors (see below), whose sum is σ = 87687840. Its totient is φ = 46728000.

The previous prime is 64536713. The next prime is 64536739. The reversal of 64536725 is 52763546.

It is not a de Polignac number, because 64536725 - 2²² = 60342421 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, 90671 + ... + 91379.

It is an arithmetic number, because the mean of its divisors is an integer number (3653660).

Almost surely, 2^64536725 is an apocalyptic number.

It is an amenable number.

64536725 is a deficient number, since it is larger than the sum of its proper divisors (23151115).

64536725 is a wasteful number, since it uses less digits than its factorization.

64536725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1061 (or 1056 counting only the distinct ones).

The product of its digits is 151200, while the sum is 38.

The square root of 64536725 is about 8033.4752753712. The cubic root of 64536725 is about 401.1150657658.

The spelling of 64536725 in words is "sixty-four million, five hundred thirty-six thousand, seven hundred twenty-five".