91156161 has 16 divisors (see below), whose sum is σ = 126020160. Its totient is φ = 58567680.

The previous prime is 91156147. The next prime is 91156229. The reversal of 91156161 is 16165119.

It is not a de Polignac number, because 91156161 - 2⁶ = 91156097 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (91156111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5745 + ... + 14673.

It is an arithmetic number, because the mean of its divisors is an integer number (7876260).

Almost surely, 2^91156161 is an apocalyptic number.

It is an amenable number.

91156161 is a deficient number, since it is larger than the sum of its proper divisors (34863999).

91156161 is a wasteful number, since it uses less digits than its factorization.

91156161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9056.

The product of its digits is 1620, while the sum is 30.

The square root of 91156161 is about 9547.5735660952. The cubic root of 91156161 is about 450.0512879815.

The spelling of 91156161 in words is "ninety-one million, one hundred fifty-six thousand, one hundred sixty-one".