91891946375 has 16 divisors (see below), whose sum is σ = 115181976000. Its totient is φ = 73192514400.

The previous prime is 91891946371. The next prime is 91891946401. The reversal of 91891946375 is 57364919819.

It is not a de Polignac number, because 91891946375 - 2² = 91891946371 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91891946371) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1576475 + ... + 1633724.

It is an arithmetic number, because the mean of its divisors is an integer number (7198873500).

Almost surely, 2^91891946375 is an apocalyptic number.

91891946375 is a deficient number, since it is larger than the sum of its proper divisors (23290029625).

91891946375 is a wasteful number, since it uses less digits than its factorization.

91891946375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3210443 (or 3210433 counting only the distinct ones).

The product of its digits is 14696640, while the sum is 62.

The spelling of 91891946375 in words is "ninety-one billion, eight hundred ninety-one million, nine hundred forty-six thousand, three hundred seventy-five".