91694570891728 has 40 divisors (see below), whose sum is σ = 203105411225280. Its totient is φ = 39284621725440.

The previous prime is 91694570891701. The next prime is 91694570891753. The reversal of 91694570891728 is 82719807549619.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135614533 + ... + 136288996.

It is an arithmetic number, because the mean of its divisors is an integer number (5077635280632).

Almost surely, 2^{91694570891728} is an apocalyptic number.

It is an amenable number.

91694570891728 is an abundant number, since it is smaller than the sum of its proper divisors (111410840333552).

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

91694570891728 is a wasteful number, since it uses less digits than its factorization.

91694570891728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271906555 (or 271906549 counting only the distinct ones).

The product of its (nonzero) digits is 548674560, while the sum is 76.

The spelling of 91694570891728 in words is "ninety-one trillion, six hundred ninety-four billion, five hundred seventy million, eight hundred ninety-one thousand, seven hundred twenty-eight".