91158405800 has 96 divisors (see below), whose sum is σ = 264241033920. Its totient is φ = 28413004800.

The previous prime is 91158405799. The next prime is 91158405817. The reversal of 91158405800 is 850485119.

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 23 ways as a sum of consecutive naturals, for example, 2944289 + ... + 2975088.

It is an arithmetic number, because the mean of its divisors is an integer number (2752510770).

Almost surely, 2^91158405800 is an apocalyptic number.

It is an amenable number.

91158405800 is an abundant number, since it is smaller than the sum of its proper divisors (173082628120).

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

91158405800 is a wasteful number, since it uses less digits than its factorization.

91158405800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5919411 (or 5919402 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 41.

The spelling of 91158405800 in words is "ninety-one billion, one hundred fifty-eight million, four hundred five thousand, eight hundred".