56560528091 has 2 divisors, whose sum is σ = 56560528092. Its totient is φ = 56560528090.

The previous prime is 56560528069. The next prime is 56560528093. The reversal of 56560528091 is 19082506565.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56560528091 - 2²² = 56556333787 is a prime.

Together with 56560528093, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (56560528093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28280264045 + 28280264046.

It is an arithmetic number, because the mean of its divisors is an integer number (28280264046).

Almost surely, 2^56560528091 is an apocalyptic number.

56560528091 is a deficient number, since it is larger than the sum of its proper divisors (1).

56560528091 is an equidigital number, since it uses as much as digits as its factorization.

56560528091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648000, while the sum is 47.

The spelling of 56560528091 in words is "fifty-six billion, five hundred sixty million, five hundred twenty-eight thousand, ninety-one".