556691794177 has 2 divisors, whose sum is σ = 556691794178. Its totient is φ = 556691794176.

The previous prime is 556691794171. The next prime is 556691794213. The reversal of 556691794177 is 771497196655.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 505344687376 + 51347106801 = 710876^2 + 226599^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-556691794177 is a prime.

It is a super-2 number, since 2×556691794177² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (556691794171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278345897088 + 278345897089.

It is an arithmetic number, because the mean of its divisors is an integer number (278345897089).

Almost surely, 2^556691794177 is an apocalyptic number.

It is an amenable number.

556691794177 is a deficient number, since it is larger than the sum of its proper divisors (1).

556691794177 is an equidigital number, since it uses as much as digits as its factorization.

556691794177 is an evil number, because the sum of its binary digits is even.

The product of its digits is 100018800, while the sum is 67.

The spelling of 556691794177 in words is "five hundred fifty-six billion, six hundred ninety-one million, seven hundred ninety-four thousand, one hundred seventy-seven".