556747718477 has 2 divisors, whose sum is σ = 556747718478. Its totient is φ = 556747718476.

The previous prime is 556747718459. The next prime is 556747718507. The reversal of 556747718477 is 774817747655.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 507094955236 + 49652763241 = 712106^2 + 222829^2 .

It is a cyclic number.

It is not a de Polignac number, because 556747718477 - 2³² = 552452751181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (556747718077) 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 as a sum of consecutive naturals, namely, 278373859238 + 278373859239.

It is an arithmetic number, because the mean of its divisors is an integer number (278373859239).

Almost surely, 2^556747718477 is an apocalyptic number.

It is an amenable number.

556747718477 is a deficient number, since it is larger than the sum of its proper divisors (1).

556747718477 is an equidigital number, since it uses as much as digits as its factorization.

556747718477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 322694400, while the sum is 68.

The spelling of 556747718477 in words is "five hundred fifty-six billion, seven hundred forty-seven million, seven hundred eighteen thousand, four hundred seventy-seven".