91091092011 has 24 divisors (see below), whose sum is σ = 122621218704. Its totient is φ = 60149597760.

The previous prime is 91091092009. The next prime is 91091092033. The reversal of 91091092011 is 11029019019.

It is not a de Polignac number, because 91091092011 - 2¹ = 91091092009 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91091092091) 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 23 ways as a sum of consecutive naturals, for example, 39724581 + ... + 39726873.

It is an arithmetic number, because the mean of its divisors is an integer number (5109217446).

Almost surely, 2^91091092011 is an apocalyptic number.

91091092011 is a deficient number, since it is larger than the sum of its proper divisors (31530126693).

91091092011 is a wasteful number, since it uses less digits than its factorization.

91091092011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3371 (or 3244 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 33.

The spelling of 91091092011 in words is "ninety-one billion, ninety-one million, ninety-two thousand, eleven".