656897125 has 16 divisors (see below), whose sum is σ = 848081520. Its totient is φ = 507393600.

The previous prime is 656897117. The next prime is 656897147. The reversal of 656897125 is 521798656.

It can be written as a sum of positive squares in 8 ways, for example, as 420783169 + 236113956 = 20513^2 + 15366^2 .

It is not a de Polignac number, because 656897125 - 2³ = 656897117 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86982 + ... + 94231.

It is an arithmetic number, because the mean of its divisors is an integer number (53005095).

Almost surely, 2^656897125 is an apocalyptic number.

It is an amenable number.

656897125 is a deficient number, since it is larger than the sum of its proper divisors (191184395).

656897125 is a wasteful number, since it uses less digits than its factorization.

656897125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181257 (or 181247 counting only the distinct ones).

The product of its digits is 907200, while the sum is 49.

The square root of 656897125 is about 25630.0043893871. The cubic root of 656897125 is about 869.2922084934.

The spelling of 656897125 in words is "six hundred fifty-six million, eight hundred ninety-seven thousand, one hundred twenty-five".