91009550045500 has 96 divisors (see below), whose sum is σ = 207439127820288. Its totient is φ = 34815619080000.

The previous prime is 91009550045459. The next prime is 91009550045573. The reversal of 91009550045500 is 554005590019.

91009550045500 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 73573117 + ... + 74799883.

It is an arithmetic number, because the mean of its divisors is an integer number (2160824248128).

Almost surely, 2^{91009550045500} 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 91009550045500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103719563910144).

91009550045500 is an abundant number, since it is smaller than the sum of its proper divisors (116429577774788).

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

91009550045500 is a wasteful number, since it uses less digits than its factorization.

91009550045500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1233260 (or 1233248 counting only the distinct ones).

The product of its (nonzero) digits is 202500, while the sum is 43.

The spelling of 91009550045500 in words is "ninety-one trillion, nine billion, five hundred fifty million, forty-five thousand, five hundred".