91235565696 has 128 divisors (see below), whose sum is σ = 264489753600. Its totient is φ = 27635225600.

The previous prime is 91235565683. The next prime is 91235565727. The reversal of 91235565696 is 69656553219.

It is a tau number, because it is divible by the number of its divisors (128).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18545125 + ... + 18550043.

It is an arithmetic number, because the mean of its divisors is an integer number (2066326200).

Almost surely, 2^91235565696 is an apocalyptic number.

91235565696 is a gapful number since it is divisible by the number (96) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91235565696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132244876800).

91235565696 is an abundant number, since it is smaller than the sum of its proper divisors (173254187904).

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

91235565696 is a wasteful number, since it uses less digits than its factorization.

91235565696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9338 (or 9326 counting only the distinct ones).

The product of its digits is 13122000, while the sum is 57.

The spelling of 91235565696 in words is "ninety-one billion, two hundred thirty-five million, five hundred sixty-five thousand, six hundred ninety-six".