91116699520 has 192 divisors, whose sum is σ = 276425699760. Its totient is φ = 28399902720.

The previous prime is 91116699503. The next prime is 91116699521. The reversal of 91116699520 is 2599661119.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91116699521) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 212892 + ... + 477028.

Almost surely, 2^91116699520 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 91116699520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138212849880).

91116699520 is an abundant number, since it is smaller than the sum of its proper divisors (185309000240).

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

91116699520 is a wasteful number, since it uses less digits than its factorization.

91116699520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264181 (or 264162 counting only the distinct ones).

The product of its (nonzero) digits is 262440, while the sum is 49.

The spelling of 91116699520 in words is "ninety-one billion, one hundred sixteen million, six hundred ninety-nine thousand, five hundred twenty".