91146880000 has 440 divisors, whose sum is σ = 252774761184. Its totient is φ = 32834560000.

The previous prime is 91146879991. The next prime is 91146880031. The reversal of 91146880000 is 8864119.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (440).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 851839947 + ... + 851840053.

Almost surely, 2^91146880000 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 91146880000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126387380592).

91146880000 is an abundant number, since it is smaller than the sum of its proper divisors (161627881184).

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

91146880000 is an equidigital number, since it uses as much as digits as its factorization.

91146880000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180 (or 125 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 37.

The spelling of 91146880000 in words is "ninety-one billion, one hundred forty-six million, eight hundred eighty thousand".