556177778390 has 16 divisors (see below), whose sum is σ = 1078129232208. Its totient is φ = 205357948896.

The previous prime is 556177778389. The next prime is 556177778417. The reversal of 556177778390 is 93877771655.

It is a Harshad number since it is a multiple of its sum of digits (65).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2139145172 + ... + 2139145431.

It is an arithmetic number, because the mean of its divisors is an integer number (67383077013).

Almost surely, 2^556177778390 is an apocalyptic number.

556177778390 is a deficient number, since it is larger than the sum of its proper divisors (521951453818).

556177778390 is a wasteful number, since it uses less digits than its factorization.

556177778390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4278290623.

The product of its (nonzero) digits is 77792400, while the sum is 65.

The spelling of 556177778390 in words is "five hundred fifty-six billion, one hundred seventy-seven million, seven hundred seventy-eight thousand, three hundred ninety".