91117445799 has 16 divisors (see below), whose sum is σ = 121794967008. Its totient is φ = 60592637952.

The previous prime is 91117445789. The next prime is 91117445803. The reversal of 91117445799 is 99754471119.

It is not a de Polignac number, because 91117445799 - 2⁸ = 91117445543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91117445729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1922839 + ... + 1969655.

It is an arithmetic number, because the mean of its divisors is an integer number (7612185438).

Almost surely, 2^91117445799 is an apocalyptic number.

91117445799 is a deficient number, since it is larger than the sum of its proper divisors (30677521209).

91117445799 is a wasteful number, since it uses less digits than its factorization.

91117445799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48434.

The product of its digits is 2857680, while the sum is 57.

The spelling of 91117445799 in words is "ninety-one billion, one hundred seventeen million, four hundred forty-five thousand, seven hundred ninety-nine".