91944735903 has 16 divisors (see below), whose sum is σ = 137254233600. Its totient is φ = 60828576120.

The previous prime is 91944735881. The next prime is 91944735929. The reversal of 91944735903 is 30953744919.

It is a happy number.

91944735903 is a `hidden beast` number, since 9 + 1 + 9 + 4 + 47 + 3 + 590 + 3 = 666.

It is not a de Polignac number, because 91944735903 - 2¹² = 91944731807 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91944735903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91944735983) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 12994023 + ... + 13001096.

It is an arithmetic number, because the mean of its divisors is an integer number (8578389600).

Almost surely, 2^91944735903 is an apocalyptic number.

91944735903 is a deficient number, since it is larger than the sum of its proper divisors (45309497697).

91944735903 is a wasteful number, since it uses less digits than its factorization.

91944735903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25995259 (or 25995253 counting only the distinct ones).

The product of its (nonzero) digits is 3674160, while the sum is 54.

The spelling of 91944735903 in words is "ninety-one billion, nine hundred forty-four million, seven hundred thirty-five thousand, nine hundred three".