91105761216 has 56 divisors (see below), whose sum is σ = 253737546880. Its totient is φ = 28770239232.

The previous prime is 91105761211. The next prime is 91105761239. The reversal of 91105761216 is 61216750119.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91105761211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12483436 + ... + 12490731.

Almost surely, 2^91105761216 is an apocalyptic number.

91105761216 is a gapful number since it is divisible by the number (96) formed by its first and last digit.

It is an amenable number.

91105761216 is an abundant number, since it is smaller than the sum of its proper divisors (162631785664).

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

91105761216 is a wasteful number, since it uses less digits than its factorization.

91105761216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24974201 (or 24974191 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 39.

The spelling of 91105761216 in words is "ninety-one billion, one hundred five million, seven hundred sixty-one thousand, two hundred sixteen".