91647164161 has 12 divisors (see below), whose sum is σ = 108878266368. Its totient is φ = 76883333352.

The previous prime is 91647164117. The next prime is 91647164173. The reversal of 91647164161 is 16146174619.

It is not a de Polignac number, because 91647164161 - 2⁹ = 91647163649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91647164111) 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, 19895041 + ... + 19899646.

It is an arithmetic number, because the mean of its divisors is an integer number (9073188864).

Almost surely, 2^91647164161 is an apocalyptic number.

It is an amenable number.

91647164161 is a deficient number, since it is larger than the sum of its proper divisors (17231102207).

91647164161 is a wasteful number, since it uses less digits than its factorization.

91647164161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39794748 (or 39794741 counting only the distinct ones).

The product of its digits is 217728, while the sum is 46.

The spelling of 91647164161 in words is "ninety-one billion, six hundred forty-seven million, one hundred sixty-four thousand, one hundred sixty-one".