91712061318 has 16 divisors (see below), whose sum is σ = 183428305200. Its totient is φ = 30569990016.

The previous prime is 91712061313. The next prime is 91712061319. The reversal of 91712061318 is 81316021719.

It is a super-2 number, since 2×91712061318² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91712061313) by changing a digit.

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, 160146 + ... + 457242.

It is an arithmetic number, because the mean of its divisors is an integer number (11464269075).

Almost surely, 2^91712061318 is an apocalyptic number.

91712061318 is an abundant number, since it is smaller than the sum of its proper divisors (91716243882).

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

91712061318 is a wasteful number, since it uses less digits than its factorization.

91712061318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348551.

The product of its (nonzero) digits is 18144, while the sum is 39.

The spelling of 91712061318 in words is "ninety-one billion, seven hundred twelve million, sixty-one thousand, three hundred eighteen".