91850544240 has 160 divisors (see below), whose sum is σ = 350445236736. Its totient is φ = 19379450880.

The previous prime is 91850544221. The next prime is 91850544299. The reversal of 91850544240 is 4244505819.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 91850544192 and 91850544201.

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, 2080966 + ... + 2124645.

Almost surely, 2^91850544240 is an apocalyptic number.

It is an amenable number.

91850544240 is an abundant number, since it is smaller than the sum of its proper divisors (258594692496).

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

91850544240 is a wasteful number, since it uses less digits than its factorization.

91850544240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4205647 (or 4205641 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 42.

The spelling of 91850544240 in words is "ninety-one billion, eight hundred fifty million, five hundred forty-four thousand, two hundred forty".