91071552315280 has 160 divisors (see below), whose sum is σ = 225510713176320. Its totient is φ = 34127425812480.

The previous prime is 91071552315173. The next prime is 91071552315311. The reversal of 91071552315280 is 8251325517019.

It is a super-2 number, since 2×91071552315280² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 54866166 + ... + 56501674.

It is an arithmetic number, because the mean of its divisors is an integer number (1409441957352).

Almost surely, 2^{91071552315280} 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 91071552315280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112755356588160).

91071552315280 is an abundant number, since it is smaller than the sum of its proper divisors (134439160861040).

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

91071552315280 is a wasteful number, since it uses less digits than its factorization.

91071552315280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1636169 (or 1636163 counting only the distinct ones).

The product of its (nonzero) digits is 756000, while the sum is 49.

The spelling of 91071552315280 in words is "ninety-one trillion, seventy-one billion, five hundred fifty-two million, three hundred fifteen thousand, two hundred eighty".