91763020771 has 2 divisors, whose sum is σ = 91763020772. Its totient is φ = 91763020770.

The previous prime is 91763020747. The next prime is 91763020847. The reversal of 91763020771 is 17702036719.

It is a weak prime.

It is an emirp because it is prime and its reverse (17702036719) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91763020771 - 2²⁷ = 91628803043 is a prime.

It is not a weakly prime, because it can be changed into another prime (91763020721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45881510385 + 45881510386.

It is an arithmetic number, because the mean of its divisors is an integer number (45881510386).

Almost surely, 2^91763020771 is an apocalyptic number.

91763020771 is a deficient number, since it is larger than the sum of its proper divisors (1).

91763020771 is an equidigital number, since it uses as much as digits as its factorization.

91763020771 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 111132, while the sum is 43.

The spelling of 91763020771 in words is "ninety-one billion, seven hundred sixty-three million, twenty thousand, seven hundred seventy-one".