91798986240 has 480 divisors, whose sum is σ = 349719866496. Its totient is φ = 22112501760.

The previous prime is 91798986163. The next prime is 91798986247. The reversal of 91798986240 is 4268989719.

It is a tau number, because it is divible by the number of its divisors (480).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91798986247) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14074180 + ... + 14080700.

Almost surely, 2^91798986240 is an apocalyptic number.

91798986240 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 91798986240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174859933248).

91798986240 is an abundant number, since it is smaller than the sum of its proper divisors (257920880256).

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

91798986240 is a wasteful number, since it uses less digits than its factorization.

91798986240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6610 (or 6591 counting only the distinct ones).

The product of its (nonzero) digits is 15676416, while the sum is 63.

The spelling of 91798986240 in words is "ninety-one billion, seven hundred ninety-eight million, nine hundred eighty-six thousand, two hundred forty".