556111977 has 4 divisors (see below), whose sum is σ = 741482640. Its totient is φ = 370741316.

The previous prime is 556111967. The next prime is 556111979. The reversal of 556111977 is 779111655.

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 556111977 - 2¹⁶ = 556046441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (556111979) 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, 92685327 + ... + 92685332.

It is an arithmetic number, because the mean of its divisors is an integer number (185370660).

Almost surely, 2^556111977 is an apocalyptic number.

It is an amenable number.

556111977 is a deficient number, since it is larger than the sum of its proper divisors (185370663).

556111977 is a wasteful number, since it uses less digits than its factorization.

556111977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185370662.

The product of its digits is 66150, while the sum is 42.

The square root of 556111977 is about 23582.0265668581. The cubic root of 556111977 is about 822.3450505252.

The spelling of 556111977 in words is "five hundred fifty-six million, one hundred eleven thousand, nine hundred seventy-seven".