556056977 has 4 divisors (see below), whose sum is σ = 635493696. Its totient is φ = 476620260.

The previous prime is 556056971. The next prime is 556056997. The reversal of 556056977 is 779650655.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 556056977 - 2⁶ = 556056913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (556056971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39718349 + ... + 39718362.

It is an arithmetic number, because the mean of its divisors is an integer number (158873424).

Almost surely, 2^556056977 is an apocalyptic number.

It is an amenable number.

556056977 is a deficient number, since it is larger than the sum of its proper divisors (79436719).

556056977 is an equidigital number, since it uses as much as digits as its factorization.

556056977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79436718.

The product of its (nonzero) digits is 1984500, while the sum is 50.

The square root of 556056977 is about 23580.8603956683. The cubic root of 556056977 is about 822.3179393973.

The spelling of 556056977 in words is "five hundred fifty-six million, fifty-six thousand, nine hundred seventy-seven".