625972868 has 6 divisors (see below), whose sum is σ = 1095452526. Its totient is φ = 312986432.

The previous prime is 625972847. The next prime is 625972891. The reversal of 625972868 is 868279526.

It can be written as a sum of positive squares in only one way, i.e., 564632644 + 61340224 = 23762^2 + 7832^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78246605 + ... + 78246612.

It is an arithmetic number, because the mean of its divisors is an integer number (182575421).

Almost surely, 2^625972868 is an apocalyptic number.

It is an amenable number.

625972868 is a deficient number, since it is larger than the sum of its proper divisors (469479658).

625972868 is a wasteful number, since it uses less digits than its factorization.

625972868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156493221 (or 156493219 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 53.

The square root of 625972868 is about 25019.4497941102. The cubic root of 625972868 is about 855.4313649262.

The spelling of 625972868 in words is "six hundred twenty-five million, nine hundred seventy-two thousand, eight hundred sixty-eight".