91335511136 has 96 divisors (see below), whose sum is σ = 192273056640. Its totient is φ = 42625529856.

The previous prime is 91335511103. The next prime is 91335511153. The reversal of 91335511136 is 63111553319.

It is a self number, because there is not a number n which added to its sum of digits gives 91335511136.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5382281 + ... + 5399223.

It is an arithmetic number, because the mean of its divisors is an integer number (2002844340).

Almost surely, 2^91335511136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91335511136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96136528320).

91335511136 is an abundant number, since it is smaller than the sum of its proper divisors (100937545504).

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

91335511136 is a wasteful number, since it uses less digits than its factorization.

91335511136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17176 (or 17168 counting only the distinct ones).

The product of its digits is 36450, while the sum is 38.

The spelling of 91335511136 in words is "ninety-one billion, three hundred thirty-five million, five hundred eleven thousand, one hundred thirty-six".