556138468 has 6 divisors (see below), whose sum is σ = 973242326. Its totient is φ = 278069232.

The previous prime is 556138463. The next prime is 556138489. The reversal of 556138468 is 864831655.

It can be written as a sum of positive squares in only one way, i.e., 432972864 + 123165604 = 20808^2 + 11098^2 .

It is not an unprimeable number, because it can be changed into a prime (556138463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69517305 + ... + 69517312.

Almost surely, 2^556138468 is an apocalyptic number.

It is an amenable number.

556138468 is a deficient number, since it is larger than the sum of its proper divisors (417103858).

556138468 is a wasteful number, since it uses less digits than its factorization.

556138468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139034621 (or 139034619 counting only the distinct ones).

The product of its digits is 691200, while the sum is 46.

The square root of 556138468 is about 23582.5882379352. The cubic root of 556138468 is about 822.3581080854.

The spelling of 556138468 in words is "five hundred fifty-six million, one hundred thirty-eight thousand, four hundred sixty-eight".