56991922919983 has 2 divisors, whose sum is σ = 56991922919984. Its totient is φ = 56991922919982.

The previous prime is 56991922919963. The next prime is 56991922919993. The reversal of 56991922919983 is 38991922919965.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56991922919983 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 56991922919897 and 56991922919906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56991922919903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28495961459991 + 28495961459992.

It is an arithmetic number, because the mean of its divisors is an integer number (28495961459992).

Almost surely, 2^{56991922919983} is an apocalyptic number.

56991922919983 is a deficient number, since it is larger than the sum of its proper divisors (1).

56991922919983 is an equidigital number, since it uses as much as digits as its factorization.

56991922919983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1530550080, while the sum is 82.

The spelling of 56991922919983 in words is "fifty-six trillion, nine hundred ninety-one billion, nine hundred twenty-two million, nine hundred nineteen thousand, nine hundred eighty-three".