91135672320 has 912 divisors, whose sum is σ = 378694597248. Its totient is φ = 18496880640.

The previous prime is 91135672247. The next prime is 91135672379. The reversal of 91135672320 is 2327653119.

It is a happy number.

It is a super-3 number, since 3×91135672320³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2119434219 + ... + 2119434261.

It is an arithmetic number, because the mean of its divisors is an integer number (415235304).

Almost surely, 2^91135672320 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 91135672320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (189347298624).

91135672320 is an abundant number, since it is smaller than the sum of its proper divisors (287558924928).

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

91135672320 is an equidigital number, since it uses as much as digits as its factorization.

91135672320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112 (or 71 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 39.

The spelling of 91135672320 in words is "ninety-one billion, one hundred thirty-five million, six hundred seventy-two thousand, three hundred twenty".