91124672320 has 224 divisors, whose sum is σ = 249514888320. Its totient is φ = 31388098560.

The previous prime is 91124672299. The next prime is 91124672381. The reversal of 91124672320 is 2327642119.

It is a super-5 number, since 5×91124672320⁵ (a number of 56 digits) contains 55555 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 91124672320.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5401819 + ... + 5418661.

Almost surely, 2^91124672320 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 91124672320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124757444160).

91124672320 is an abundant number, since it is smaller than the sum of its proper divisors (158390216000).

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

91124672320 is a wasteful number, since it uses less digits than its factorization.

91124672320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16953 (or 16943 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The spelling of 91124672320 in words is "ninety-one billion, one hundred twenty-four million, six hundred seventy-two thousand, three hundred twenty".