91319423112 has 64 divisors (see below), whose sum is σ = 253714665600. Its totient is φ = 30433855680.

The previous prime is 91319423093. The next prime is 91319423119. The reversal of 91319423112 is 21132491319.

It is a happy number.

91319423112 is a `hidden beast` number, since 91 + 31 + 9 + 423 + 112 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (91319423119) 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, 1144437 + ... + 1221627.

It is an arithmetic number, because the mean of its divisors is an integer number (3964291650).

Almost surely, 2^91319423112 is an apocalyptic number.

It is an amenable number.

91319423112 is an abundant number, since it is smaller than the sum of its proper divisors (162395242488).

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

91319423112 is a wasteful number, since it uses less digits than its factorization.

91319423112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82683 (or 82673 counting only the distinct ones).

The product of its digits is 11664, while the sum is 36.

The spelling of 91319423112 in words is "ninety-one billion, three hundred nineteen million, four hundred twenty-three thousand, one hundred twelve".