56490319591 has 2 divisors, whose sum is σ = 56490319592. Its totient is φ = 56490319590.

The previous prime is 56490319579. The next prime is 56490319649. The reversal of 56490319591 is 19591309465.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56490319591 - 2⁷ = 56490319463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56490319531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28245159795 + 28245159796.

It is an arithmetic number, because the mean of its divisors is an integer number (28245159796).

Almost surely, 2^56490319591 is an apocalyptic number.

56490319591 is a deficient number, since it is larger than the sum of its proper divisors (1).

56490319591 is an equidigital number, since it uses as much as digits as its factorization.

56490319591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1312200, while the sum is 52.

The spelling of 56490319591 in words is "fifty-six billion, four hundred ninety million, three hundred nineteen thousand, five hundred ninety-one".