64735725 has 12 divisors (see below), whose sum is σ = 107029856. Its totient is φ = 34525680.

The previous prime is 64735709. The next prime is 64735729. The reversal of 64735725 is 52753746.

It is not a de Polignac number, because 64735725 - 2⁴ = 64735709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64735729) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 431497 + ... + 431646.

Almost surely, 2^64735725 is an apocalyptic number.

It is an amenable number.

64735725 is a deficient number, since it is larger than the sum of its proper divisors (42294131).

64735725 is a wasteful number, since it uses less digits than its factorization.

64735725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 863156 (or 863151 counting only the distinct ones).

The product of its digits is 176400, while the sum is 39.

The square root of 64735725 is about 8045.8514154811. The cubic root of 64735725 is about 401.5269242558.

The spelling of 64735725 in words is "sixty-four million, seven hundred thirty-five thousand, seven hundred twenty-five".