56991668594629 has 2 divisors, whose sum is σ = 56991668594630. Its totient is φ = 56991668594628.

The previous prime is 56991668594587. The next prime is 56991668594657. The reversal of 56991668594629 is 92649586619965.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34488722744100 + 22502945850529 = 5872710^2 + 4743727^2 .

It is a cyclic number.

It is not a de Polignac number, because 56991668594629 - 2¹¹ = 56991668592581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56991668594659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28495834297314 + 28495834297315.

It is an arithmetic number, because the mean of its divisors is an integer number (28495834297315).

Almost surely, 2^{56991668594629} is an apocalyptic number.

It is an amenable number.

56991668594629 is a deficient number, since it is larger than the sum of its proper divisors (1).

56991668594629 is an equidigital number, since it uses as much as digits as its factorization.

56991668594629 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13604889600, while the sum is 85.

The spelling of 56991668594629 in words is "fifty-six trillion, nine hundred ninety-one billion, six hundred sixty-eight million, five hundred ninety-four thousand, six hundred twenty-nine".