91433719008 has 36 divisors (see below), whose sum is σ = 260014639248. Its totient is φ = 30477906240.

The previous prime is 91433719007. The next prime is 91433719021. The reversal of 91433719008 is 80091733419.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91433719007) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 158738808 + ... + 158739383.

It is an arithmetic number, because the mean of its divisors is an integer number (7222628868).

Almost surely, 2^91433719008 is an apocalyptic number.

It is an amenable number.

91433719008 is an abundant number, since it is smaller than the sum of its proper divisors (168580920240).

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

91433719008 is a wasteful number, since it uses less digits than its factorization.

91433719008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317478207 (or 317478196 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The spelling of 91433719008 in words is "ninety-one billion, four hundred thirty-three million, seven hundred nineteen thousand, eight".