91200487800 has 192 divisors, whose sum is σ = 296421384960. Its totient is φ = 23151744000.

The previous prime is 91200487793. The next prime is 91200487849. The reversal of 91200487800 is 878400219.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2896140 + ... + 2927460.

It is an arithmetic number, because the mean of its divisors is an integer number (1543861380).

Almost surely, 2^91200487800 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 91200487800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148210692480).

91200487800 is an abundant number, since it is smaller than the sum of its proper divisors (205220897160).

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

91200487800 is a wasteful number, since it uses less digits than its factorization.

91200487800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31574 (or 31565 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 39.

The spelling of 91200487800 in words is "ninety-one billion, two hundred million, four hundred eighty-seven thousand, eight hundred".