91956811800 has 384 divisors, whose sum is σ = 344377958400. Its totient is φ = 19828800000.

The previous prime is 91956811763. The next prime is 91956811841. The reversal of 91956811800 is 811865919.

It is a self number, because there is not a number n which added to its sum of digits gives 91956811800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 20027505 + ... + 20032095.

It is an arithmetic number, because the mean of its divisors is an integer number (896817600).

Almost surely, 2^91956811800 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 91956811800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172188979200).

91956811800 is an abundant number, since it is smaller than the sum of its proper divisors (252421146600).

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

91956811800 is a wasteful number, since it uses less digits than its factorization.

91956811800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4887 (or 4878 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 48.

The spelling of 91956811800 in words is "ninety-one billion, nine hundred fifty-six million, eight hundred eleven thousand, eight hundred".