56165355091 has 2 divisors, whose sum is σ = 56165355092. Its totient is φ = 56165355090.

The previous prime is 56165355031. The next prime is 56165355121. The reversal of 56165355091 is 19055356165.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56165355091 - 2²⁹ = 55628484179 is a prime.

It is a super-2 number, since 2×56165355091² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (56165355031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28082677545 + 28082677546.

It is an arithmetic number, because the mean of its divisors is an integer number (28082677546).

Almost surely, 2^56165355091 is an apocalyptic number.

56165355091 is a deficient number, since it is larger than the sum of its proper divisors (1).

56165355091 is an equidigital number, since it uses as much as digits as its factorization.

56165355091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 607500, while the sum is 46.

The spelling of 56165355091 in words is "fifty-six billion, one hundred sixty-five million, three hundred fifty-five thousand, ninety-one".