91055378176 has 108 divisors (see below), whose sum is σ = 212731258152. Its totient is φ = 38783453184.

The previous prime is 91055378171. The next prime is 91055378177. The reversal of 91055378176 is 67187355019.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91055378171) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2022406 + ... + 2066938.

Almost surely, 2^91055378176 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 91055378176, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106365629076).

91055378176 is an abundant number, since it is smaller than the sum of its proper divisors (121675879976).

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

91055378176 is a wasteful number, since it uses less digits than its factorization.

91055378176 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44726 (or 44705 counting only the distinct ones).

The product of its (nonzero) digits is 1587600, while the sum is 52.

The spelling of 91055378176 in words is "ninety-one billion, fifty-five million, three hundred seventy-eight thousand, one hundred seventy-six".