91911011063 has 2 divisors, whose sum is σ = 91911011064. Its totient is φ = 91911011062.

The previous prime is 91911010993. The next prime is 91911011081. The reversal of 91911011063 is 36011011919.

It is a strong prime.

It is an emirp because it is prime and its reverse (36011011919) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91911011063 - 2²² = 91906816759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91911011363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45955505531 + 45955505532.

It is an arithmetic number, because the mean of its divisors is an integer number (45955505532).

Almost surely, 2^91911011063 is an apocalyptic number.

91911011063 is a deficient number, since it is larger than the sum of its proper divisors (1).

91911011063 is an equidigital number, since it uses as much as digits as its factorization.

91911011063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1458, while the sum is 32.

The spelling of 91911011063 in words is "ninety-one billion, nine hundred eleven million, eleven thousand, sixty-three".