91916312563 has 2 divisors, whose sum is σ = 91916312564. Its totient is φ = 91916312562.

The previous prime is 91916312561. The next prime is 91916312567. The reversal of 91916312563 is 36521361919.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91916312563 - 2¹ = 91916312561 is a prime.

It is a super-2 number, since 2×91916312563² (a number of 23 digits) contains 22 as substring.

Together with 91916312561, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (91916312561) 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, 45958156281 + 45958156282.

It is an arithmetic number, because the mean of its divisors is an integer number (45958156282).

Almost surely, 2^91916312563 is an apocalyptic number.

91916312563 is a deficient number, since it is larger than the sum of its proper divisors (1).

91916312563 is an equidigital number, since it uses as much as digits as its factorization.

91916312563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 262440, while the sum is 46.

The spelling of 91916312563 in words is "ninety-one billion, nine hundred sixteen million, three hundred twelve thousand, five hundred sixty-three".