91114239744 has 864 divisors, whose sum is σ = 321503212800. Its totient is φ = 25198387200.

The previous prime is 91114239743. The next prime is 91114239751. The reversal of 91114239744 is 44793241119.

91114239744 is a `hidden beast` number, since 91 + 11 + 423 + 97 + 44 = 666.

It is a tau number, because it is divible by the number of its divisors (864).

It is a self number, because there is not a number n which added to its sum of digits gives 91114239744.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91114239743) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2118935787 + ... + 2118935829.

It is an arithmetic number, because the mean of its divisors is an integer number (372110200).

Almost surely, 2^91114239744 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 91114239744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (160751606400).

91114239744 is an abundant number, since it is smaller than the sum of its proper divisors (230388973056).

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

91114239744 is a wasteful number, since it uses less digits than its factorization.

91114239744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170 (or 119 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The spelling of 91114239744 in words is "ninety-one billion, one hundred fourteen million, two hundred thirty-nine thousand, seven hundred forty-four".