557206868 has 6 divisors (see below), whose sum is σ = 975112026. Its totient is φ = 278603432.

The previous prime is 557206849. The next prime is 557206891. The reversal of 557206868 is 868602755.

It can be written as a sum of positive squares in only one way, i.e., 456164164 + 101042704 = 21358^2 + 10052^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69650855 + ... + 69650862.

It is an arithmetic number, because the mean of its divisors is an integer number (162518671).

Almost surely, 2^557206868 is an apocalyptic number.

It is an amenable number.

557206868 is a deficient number, since it is larger than the sum of its proper divisors (417905158).

557206868 is a wasteful number, since it uses less digits than its factorization.

557206868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139301721 (or 139301719 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 47.

The square root of 557206868 is about 23605.2296747988. The cubic root of 557206868 is about 822.8843831175.

The spelling of 557206868 in words is "five hundred fifty-seven million, two hundred six thousand, eight hundred sixty-eight".