91109667022 has 16 divisors (see below), whose sum is σ = 150536011392. Its totient is φ = 41011411320.

The previous prime is 91109667001. The next prime is 91109667029. The reversal of 91109667022 is 22076690119.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 91109667022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91109667029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20101368 + ... + 20105899.

It is an arithmetic number, because the mean of its divisors is an integer number (9408500712).

Almost surely, 2^91109667022 is an apocalyptic number.

91109667022 is a deficient number, since it is larger than the sum of its proper divisors (59426344370).

91109667022 is a wasteful number, since it uses less digits than its factorization.

91109667022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40207383.

The product of its (nonzero) digits is 81648, while the sum is 43.

The spelling of 91109667022 in words is "ninety-one billion, one hundred nine million, six hundred sixty-seven thousand, twenty-two".