556779511679 has 4 divisors (see below), whose sum is σ = 574740141120. Its totient is φ = 538818882240.

The previous prime is 556779511667. The next prime is 556779511693. The reversal of 556779511679 is 976115977655.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 556779511679 - 2²⁸ = 556511076223 is a prime.

It is a super-4 number, since 4×556779511679⁴ (a number of 48 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556779511279) 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, 8980314674 + ... + 8980314735.

It is an arithmetic number, because the mean of its divisors is an integer number (143685035280).

Almost surely, 2^556779511679 is an apocalyptic number.

556779511679 is a deficient number, since it is larger than the sum of its proper divisors (17960629441).

556779511679 is a wasteful number, since it uses less digits than its factorization.

556779511679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17960629440.

The product of its digits is 125023500, while the sum is 68.

The spelling of 556779511679 in words is "five hundred fifty-six billion, seven hundred seventy-nine million, five hundred eleven thousand, six hundred seventy-nine".