91099180224 has 448 divisors, whose sum is σ = 308660800000. Its totient is φ = 26112430080.

The previous prime is 91099180217. The next prime is 91099180231. The reversal of 91099180224 is 42208199019.

It is an interprime number because it is at equal distance from previous prime (91099180217) and next prime (91099180231).

It is a self number, because there is not a number n which added to its sum of digits gives 91099180224.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 26034027 + ... + 26037525.

It is an arithmetic number, because the mean of its divisors is an integer number (688975000).

Almost surely, 2^91099180224 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 91099180224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (154330400000).

91099180224 is an abundant number, since it is smaller than the sum of its proper divisors (217561619776).

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

91099180224 is a wasteful number, since it uses less digits than its factorization.

91099180224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3613 (or 3597 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The spelling of 91099180224 in words is "ninety-one billion, ninety-nine million, one hundred eighty thousand, two hundred twenty-four".