91392719975 has 12 divisors (see below), whose sum is σ = 113835172416. Its totient is φ = 72786305280.

The previous prime is 91392719969. The next prime is 91392719993. The reversal of 91392719975 is 57991729319.

It is not a de Polignac number, because 91392719975 - 2⁶ = 91392719911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8191082 + ... + 8202231.

It is an arithmetic number, because the mean of its divisors is an integer number (9486264368).

Almost surely, 2^91392719975 is an apocalyptic number.

91392719975 is a deficient number, since it is larger than the sum of its proper divisors (22442452441).

91392719975 is a wasteful number, since it uses less digits than its factorization.

91392719975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16393546 (or 16393541 counting only the distinct ones).

The product of its digits is 9644670, while the sum is 62.

The spelling of 91392719975 in words is "ninety-one billion, three hundred ninety-two million, seven hundred nineteen thousand, nine hundred seventy-five".