91108727424 has 960 divisors, whose sum is σ = 333367293600. Its totient is φ = 24455208960.

The previous prime is 91108727389. The next prime is 91108727441. The reversal of 91108727424 is 42472780119.

It is a self number, because there is not a number n which added to its sum of digits gives 91108727424.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 558949167 + ... + 558949329.

Almost surely, 2^91108727424 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 91108727424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (166683646800).

91108727424 is an abundant number, since it is smaller than the sum of its proper divisors (242258566176).

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

91108727424 is a wasteful number, since it uses less digits than its factorization.

91108727424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255 (or 221 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The spelling of 91108727424 in words is "ninety-one billion, one hundred eight million, seven hundred twenty-seven thousand, four hundred twenty-four".