91944203085 has 64 divisors (see below), whose sum is σ = 192833372160. Its totient is φ = 40675763520.

The previous prime is 91944203041. The next prime is 91944203101. The reversal of 91944203085 is 58030244919.

91944203085 is a `hidden beast` number, since 9 + 194 + 420 + 30 + 8 + 5 = 666.

It is not a de Polignac number, because 91944203085 - 2⁸ = 91944202829 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 91944203085.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1539987 + ... + 1598576.

It is an arithmetic number, because the mean of its divisors is an integer number (3013021440).

Almost surely, 2^91944203085 is an apocalyptic number.

It is an amenable number.

91944203085 is an abundant number, since it is smaller than the sum of its proper divisors (100889169075).

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

91944203085 is a wasteful number, since it uses less digits than its factorization.

91944203085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3138615 (or 3138609 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The spelling of 91944203085 in words is "ninety-one billion, nine hundred forty-four million, two hundred three thousand, eighty-five".