91317771309 has 16 divisors (see below), whose sum is σ = 127404748800. Its totient is φ = 58069401456.

The previous prime is 91317771287. The next prime is 91317771323. The reversal of 91317771309 is 90317771319.

It is not a de Polignac number, because 91317771309 - 2⁵ = 91317771277 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91317771359) 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, 1818469 + ... + 1868010.

It is an arithmetic number, because the mean of its divisors is an integer number (7962796800).

Almost surely, 2^91317771309 is an apocalyptic number.

It is an amenable number.

91317771309 is a deficient number, since it is larger than the sum of its proper divisors (36086977491).

91317771309 is a wasteful number, since it uses less digits than its factorization.

91317771309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3686864.

The product of its (nonzero) digits is 250047, while the sum is 48.

The spelling of 91317771309 in words is "ninety-one billion, three hundred seventeen million, seven hundred seventy-one thousand, three hundred nine".