91500478163 has 2 divisors, whose sum is σ = 91500478164. Its totient is φ = 91500478162.

The previous prime is 91500478133. The next prime is 91500478169. The reversal of 91500478163 is 36187400519.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91500478163 - 2²⁶ = 91433369299 is a prime.

It is not a weakly prime, because it can be changed into another prime (91500478169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45750239081 + 45750239082.

It is an arithmetic number, because the mean of its divisors is an integer number (45750239082).

Almost surely, 2^91500478163 is an apocalyptic number.

91500478163 is a deficient number, since it is larger than the sum of its proper divisors (1).

91500478163 is an equidigital number, since it uses as much as digits as its factorization.

91500478163 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 44.

The spelling of 91500478163 in words is "ninety-one billion, five hundred million, four hundred seventy-eight thousand, one hundred sixty-three".