91122748008 has 32 divisors (see below), whose sum is σ = 227894342400. Its totient is φ = 30362586368.

The previous prime is 91122747977. The next prime is 91122748021. The reversal of 91122748008 is 80084722119.

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 7 ways as a sum of consecutive naturals, for example, 665016 + ... + 790247.

It is an arithmetic number, because the mean of its divisors is an integer number (7121698200).

Almost surely, 2^91122748008 is an apocalyptic number.

It is an amenable number.

91122748008 is an abundant number, since it is smaller than the sum of its proper divisors (136771594392).

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

91122748008 is a wasteful number, since it uses less digits than its factorization.

91122748008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1457881 (or 1457877 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 42.

The spelling of 91122748008 in words is "ninety-one billion, one hundred twenty-two million, seven hundred forty-eight thousand, eight".