764634725 has 6 divisors (see below), whose sum is σ = 948147090. Its totient is φ = 611707760.

The previous prime is 764634683. The next prime is 764634751. The reversal of 764634725 is 527436467.

It can be written as a sum of positive squares in 3 ways, for example, as 266407684 + 498227041 = 16322^2 + 22321^2 .

It is not a de Polignac number, because 764634725 - 2²⁰ = 763586149 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15292670 + ... + 15292719.

It is an arithmetic number, because the mean of its divisors is an integer number (158024515).

Almost surely, 2^764634725 is an apocalyptic number.

It is an amenable number.

764634725 is a deficient number, since it is larger than the sum of its proper divisors (183512365).

764634725 is a wasteful number, since it uses less digits than its factorization.

764634725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30585399 (or 30585394 counting only the distinct ones).

The product of its digits is 846720, while the sum is 44.

The square root of 764634725 is about 27652.0293107034. The cubic root of 764634725 is about 914.4318389434.

The spelling of 764634725 in words is "seven hundred sixty-four million, six hundred thirty-four thousand, seven hundred twenty-five".