91114512786 has 96 divisors (see below), whose sum is σ = 217729512000. Its totient is φ = 27307929600.

The previous prime is 91114512739. The next prime is 91114512799. The reversal of 91114512786 is 68721541119.

91114512786 is a `hidden beast` number, since 9 + 111 + 451 + 2 + 7 + 86 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11160546 + ... + 11168706.

It is an arithmetic number, because the mean of its divisors is an integer number (2268015750).

Almost surely, 2^91114512786 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91114512786, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108864756000).

91114512786 is an abundant number, since it is smaller than the sum of its proper divisors (126614999214).

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

91114512786 is a wasteful number, since it uses less digits than its factorization.

91114512786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8792 (or 8789 counting only the distinct ones).

The product of its digits is 120960, while the sum is 45.

The spelling of 91114512786 in words is "ninety-one billion, one hundred fourteen million, five hundred twelve thousand, seven hundred eighty-six".