556691794213 has 2 divisors, whose sum is σ = 556691794214. Its totient is φ = 556691794212.

The previous prime is 556691794177. The next prime is 556691794231. The reversal of 556691794213 is 312497196655.

Together with next prime (556691794231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 412411849249 + 144279944964 = 642193^2 + 379842^2 .

It is a cyclic number.

It is not a de Polignac number, because 556691794213 - 2²¹ = 556689697061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (556691714213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278345897106 + 278345897107.

It is an arithmetic number, because the mean of its divisors is an integer number (278345897107).

Almost surely, 2^556691794213 is an apocalyptic number.

It is an amenable number.

556691794213 is a deficient number, since it is larger than the sum of its proper divisors (1).

556691794213 is an equidigital number, since it uses as much as digits as its factorization.

556691794213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12247200, while the sum is 58.

The spelling of 556691794213 in words is "five hundred fifty-six billion, six hundred ninety-one million, seven hundred ninety-four thousand, two hundred thirteen".