91844622144 has 896 divisors, whose sum is σ = 329315673600. Its totient is φ = 25291284480.

The previous prime is 91844622137. The next prime is 91844622197. The reversal of 91844622144 is 44122644819.

91844622144 is a `hidden beast` number, since 9 + 1 + 8 + 4 + 4 + 622 + 14 + 4 = 666.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 91844622144.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 3167055922 + ... + 3167055950.

Almost surely, 2^91844622144 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 91844622144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (164657836800).

91844622144 is an abundant number, since it is smaller than the sum of its proper divisors (237471051456).

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

91844622144 is an equidigital number, since it uses as much as digits as its factorization.

91844622144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112 (or 62 counting only the distinct ones).

The product of its digits is 442368, while the sum is 45.

The spelling of 91844622144 in words is "ninety-one billion, eight hundred forty-four million, six hundred twenty-two thousand, one hundred forty-four".