91795757531 has 12 divisors (see below), whose sum is σ = 97524130032. Its totient is φ = 86386270848.

The previous prime is 91795757509. The next prime is 91795757533. The reversal of 91795757531 is 13575759719.

It is not a de Polignac number, because 91795757531 - 2⁶ = 91795757467 is a prime.

It is a super-2 number, since 2×91795757531² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91795757533) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4687346 + ... + 4706888.

It is an arithmetic number, because the mean of its divisors is an integer number (8127010836).

Almost surely, 2^91795757531 is an apocalyptic number.

91795757531 is a deficient number, since it is larger than the sum of its proper divisors (5728372501).

91795757531 is a wasteful number, since it uses less digits than its factorization.

91795757531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35830 (or 35813 counting only the distinct ones).

The product of its digits is 10418625, while the sum is 59.

The spelling of 91795757531 in words is "ninety-one billion, seven hundred ninety-five million, seven hundred fifty-seven thousand, five hundred thirty-one".