556177778397 has 48 divisors (see below), whose sum is σ = 849526579200. Its totient is φ = 349919650080.

The previous prime is 556177778389. The next prime is 556177778417. The reversal of 556177778397 is 793877771655.

It is not a de Polignac number, because 556177778397 - 2³ = 556177778389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556177778327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 23847372 + ... + 23870682.

It is an arithmetic number, because the mean of its divisors is an integer number (17698470400).

Almost surely, 2^556177778397 is an apocalyptic number.

It is an amenable number.

556177778397 is a deficient number, since it is larger than the sum of its proper divisors (293348800803).

556177778397 is a wasteful number, since it uses less digits than its factorization.

556177778397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24878 (or 24875 counting only the distinct ones).

The product of its digits is 544546800, while the sum is 72.

The spelling of 556177778397 in words is "five hundred fifty-six billion, one hundred seventy-seven million, seven hundred seventy-eight thousand, three hundred ninety-seven".