556400776 has 8 divisors (see below), whose sum is σ = 1043251470. Its totient is φ = 278200384.

The previous prime is 556400753. The next prime is 556400809. The reversal of 556400776 is 677004655.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 312228900 + 244171876 = 17670^2 + 15626^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34775041 + ... + 34775056.

Almost surely, 2^556400776 is an apocalyptic number.

It is an amenable number.

556400776 is a deficient number, since it is larger than the sum of its proper divisors (486850694).

556400776 is a wasteful number, since it uses less digits than its factorization.

556400776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69550103 (or 69550099 counting only the distinct ones).

The product of its (nonzero) digits is 176400, while the sum is 40.

The square root of 556400776 is about 23588.1490583725. The cubic root of 556400776 is about 822.4873787724.

The spelling of 556400776 in words is "five hundred fifty-six million, four hundred thousand, seven hundred seventy-six".