91003833216 has 96 divisors (see below), whose sum is σ = 262587780000. Its totient is φ = 30251814912.

The previous prime is 91003833199. The next prime is 91003833247. The reversal of 91003833216 is 61233830019.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 315160 + ... + 530408.

It is an arithmetic number, because the mean of its divisors is an integer number (2735289375).

Almost surely, 2^91003833216 is an apocalyptic number.

91003833216 is a gapful number since it is divisible by the number (96) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91003833216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131293890000).

91003833216 is an abundant number, since it is smaller than the sum of its proper divisors (171583946784).

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

91003833216 is a wasteful number, since it uses less digits than its factorization.

91003833216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215636 (or 215621 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The spelling of 91003833216 in words is "ninety-one billion, three million, eight hundred thirty-three thousand, two hundred sixteen".