91122218754 has 32 divisors (see below), whose sum is σ = 217334983680. Its totient is φ = 24902966352.

The previous prime is 91122218743. The next prime is 91122218773. The reversal of 91122218754 is 45781222119.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

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, 47163744 + ... + 47165675.

It is an arithmetic number, because the mean of its divisors is an integer number (6791718240).

Almost surely, 2^91122218754 is an apocalyptic number.

91122218754 is an abundant number, since it is smaller than the sum of its proper divisors (126212764926).

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

91122218754 is a wasteful number, since it uses less digits than its factorization.

91122218754 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94329454.

The product of its digits is 80640, while the sum is 42.

The spelling of 91122218754 in words is "ninety-one billion, one hundred twenty-two million, two hundred eighteen thousand, seven hundred fifty-four".