91766944171 has 12 divisors (see below), whose sum is σ = 108211625832. Its totient is φ = 77579879328.

The previous prime is 91766944169. The next prime is 91766944189. The reversal of 91766944171 is 17144966719.

It is a happy number.

It is not a de Polignac number, because 91766944171 - 2¹ = 91766944169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91766944111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12823785 + ... + 12830938.

It is an arithmetic number, because the mean of its divisors is an integer number (9017635486).

Almost surely, 2^91766944171 is an apocalyptic number.

91766944171 is a deficient number, since it is larger than the sum of its proper divisors (16444681661).

91766944171 is a wasteful number, since it uses less digits than its factorization.

91766944171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25654810 (or 25654803 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 55.

The spelling of 91766944171 in words is "ninety-one billion, seven hundred sixty-six million, nine hundred forty-four thousand, one hundred seventy-one".