8091990111 has 16 divisors (see below), whose sum is σ = 11269440000. Its totient is φ = 5155059360.

The previous prime is 8091990097. The next prime is 8091990113. The reversal of 8091990111 is 1110991908.

It is not a de Polignac number, because 8091990111 - 2⁵ = 8091990079 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8091990111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8091990113) 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 15 ways as a sum of consecutive naturals, for example, 14265 + ... + 128013.

It is an arithmetic number, because the mean of its divisors is an integer number (704340000).

Almost surely, 2^8091990111 is an apocalyptic number.

8091990111 is a deficient number, since it is larger than the sum of its proper divisors (3177449889).

8091990111 is a wasteful number, since it uses less digits than its factorization.

8091990111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114806.

The product of its (nonzero) digits is 5832, while the sum is 39.

The square root of 8091990111 is about 89955.4896101400. The cubic root of 8091990111 is about 2007.6366462870.

The spelling of 8091990111 in words is "eight billion, ninety-one million, nine hundred ninety thousand, one hundred eleven".