91116768 has 48 divisors (see below), whose sum is σ = 243250560. Its totient is φ = 29855616.

The previous prime is 91116749. The next prime is 91116769. The reversal of 91116768 is 86761119.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91116769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2380 + ... + 13707.

It is an arithmetic number, because the mean of its divisors is an integer number (5067720).

Almost surely, 2^91116768 is an apocalyptic number.

It is an amenable number.

91116768 is an abundant number, since it is smaller than the sum of its proper divisors (152133792).

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

91116768 is a wasteful number, since it uses less digits than its factorization.

91116768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16159 (or 16151 counting only the distinct ones).

The product of its digits is 18144, while the sum is 39.

The square root of 91116768 is about 9545.5103582784. The cubic root of 91116768 is about 449.9864489747.

The spelling of 91116768 in words is "ninety-one million, one hundred sixteen thousand, seven hundred sixty-eight".