91074170880 has 2080 divisors, whose sum is σ = 438435790848. Its totient is φ = 17517772800.

The previous prime is 91074170819. The next prime is 91074170897. The reversal of 91074170880 is 8807147019.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 2937876465 + ... + 2937876495.

Almost surely, 2^91074170880 is an apocalyptic number.

91074170880 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91074170880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (219217895424).

91074170880 is an abundant number, since it is smaller than the sum of its proper divisors (347361619968).

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

91074170880 is a wasteful number, since it uses less digits than its factorization.

91074170880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113 (or 82 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 45.

The spelling of 91074170880 in words is "ninety-one billion, seventy-four million, one hundred seventy thousand, eight hundred eighty".