91071370432 has 112 divisors (see below), whose sum is σ = 211733782272. Its totient is φ = 38057610240.

The previous prime is 91071370427. The next prime is 91071370447. The reversal of 91071370432 is 23407317019.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (112).

It is a junction number, because it is equal to n+sod(n) for n = 91071370391 and 91071370400.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3858507 + ... + 3882037.

Almost surely, 2^91071370432 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 91071370432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105866891136).

91071370432 is an abundant number, since it is smaller than the sum of its proper divisors (120662411840).

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

91071370432 is a wasteful number, since it uses less digits than its factorization.

91071370432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23766 (or 23756 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 37.

The spelling of 91071370432 in words is "ninety-one billion, seventy-one million, three hundred seventy thousand, four hundred thirty-two".