91116164 has 6 divisors (see below), whose sum is σ = 159453294. Its totient is φ = 45558080.

The previous prime is 91116139. The next prime is 91116167. The reversal of 91116164 is 46161119.

It can be written as a sum of positive squares in only one way, i.e., 73960000 + 17156164 = 8600^2 + 4142^2 .

It is not an unprimeable number, because it can be changed into a prime (91116167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11389517 + ... + 11389524.

It is an arithmetic number, because the mean of its divisors is an integer number (26575549).

Almost surely, 2^91116164 is an apocalyptic number.

It is an amenable number.

91116164 is a deficient number, since it is larger than the sum of its proper divisors (68337130).

91116164 is a wasteful number, since it uses less digits than its factorization.

91116164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22779045 (or 22779043 counting only the distinct ones).

The product of its digits is 1296, while the sum is 29.

The square root of 91116164 is about 9545.4787203157. The cubic root of 91116164 is about 449.9854546739.

The spelling of 91116164 in words is "ninety-one million, one hundred sixteen thousand, one hundred sixty-four".