91273679772 has 72 divisors (see below), whose sum is σ = 242165389200. Its totient is φ = 26704930560.

The previous prime is 91273679771. The next prime is 91273679773. The reversal of 91273679772 is 27797637219.

It is an interprime number because it is at equal distance from previous prime (91273679771) and next prime (91273679773).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91273679771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1041697 + ... + 1125912.

Almost surely, 2^91273679772 is an apocalyptic number.

It is an amenable number.

91273679772 is an abundant number, since it is smaller than the sum of its proper divisors (150891709428).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91273679772 is a wasteful number, since it uses less digits than its factorization.

91273679772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2167667 (or 2167654 counting only the distinct ones).

The product of its digits is 14002632, while the sum is 60.

The spelling of 91273679772 in words is "ninety-one billion, two hundred seventy-three million, six hundred seventy-nine thousand, seven hundred seventy-two".