91189475101 has 32 divisors (see below), whose sum is σ = 99916185600. Its totient is φ = 82969064640.

The previous prime is 91189475093. The next prime is 91189475123. The reversal of 91189475101 is 10157498119.

It is a happy number.

It is not a de Polignac number, because 91189475101 - 2³ = 91189475093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91189475161) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9865440 + ... + 9874678.

It is an arithmetic number, because the mean of its divisors is an integer number (3122380800).

Almost surely, 2^91189475101 is an apocalyptic number.

It is an amenable number.

91189475101 is a deficient number, since it is larger than the sum of its proper divisors (8726710499).

91189475101 is a wasteful number, since it uses less digits than its factorization.

91189475101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9529.

The product of its (nonzero) digits is 90720, while the sum is 46.

The spelling of 91189475101 in words is "ninety-one billion, one hundred eighty-nine million, four hundred seventy-five thousand, one hundred one".