91353068918 has 4 divisors (see below), whose sum is σ = 137029603380. Its totient is φ = 45676534458.

The previous prime is 91353068887. The next prime is 91353068923. The reversal of 91353068918 is 81986035319.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81986035319 = 881 ⋅93060199.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 91353068918.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22838267228 + ... + 22838267231.

It is an arithmetic number, because the mean of its divisors is an integer number (34257400845).

Almost surely, 2^91353068918 is an apocalyptic number.

91353068918 is a deficient number, since it is larger than the sum of its proper divisors (45676534462).

91353068918 is a wasteful number, since it uses less digits than its factorization.

91353068918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45676534461.

The product of its (nonzero) digits is 1399680, while the sum is 53.

The spelling of 91353068918 in words is "ninety-one billion, three hundred fifty-three million, sixty-eight thousand, nine hundred eighteen".