556177778394 has 32 divisors (see below), whose sum is σ = 1297207651200. Its totient is φ = 158907936096.

The previous prime is 556177778389. The next prime is 556177778417. The reversal of 556177778394 is 493877771655.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 135123739 + ... + 135127854.

It is an arithmetic number, because the mean of its divisors is an integer number (40537739100).

Almost surely, 2^556177778394 is an apocalyptic number.

556177778394 is an abundant number, since it is smaller than the sum of its proper divisors (741029872806).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

556177778394 is a wasteful number, since it uses less digits than its factorization.

556177778394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270251619 (or 270251605 counting only the distinct ones).

The product of its digits is 311169600, while the sum is 69.

The spelling of 556177778394 in words is "five hundred fifty-six billion, one hundred seventy-seven million, seven hundred seventy-eight thousand, three hundred ninety-four".