91228845722112 has 800 divisors, whose sum is σ = 338404770494208. Its totient is φ = 23869048356864.

The previous prime is 91228845722039. The next prime is 91228845722191. The reversal of 91228845722112 is 21122754882219.

91228845722112 is a `hidden beast` number, since 9 + 12 + 28 + 8 + 4 + 572 + 21 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 182351413 + ... + 182851019.

Almost surely, 2^{91228845722112} 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 91228845722112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169202385247104).

91228845722112 is an abundant number, since it is smaller than the sum of its proper divisors (247175924772096).

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

91228845722112 is a wasteful number, since it uses less digits than its factorization.

91228845722112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499698 (or 499673 counting only the distinct ones).

The product of its digits is 2580480, while the sum is 54.

The spelling of 91228845722112 in words is "ninety-one trillion, two hundred twenty-eight billion, eight hundred forty-five million, seven hundred twenty-two thousand, one hundred twelve".