11191026791 has 16 divisors (see below), whose sum is σ = 13365648384. Its totient is φ = 9169874784.

The previous prime is 11191026779. The next prime is 11191026827. The reversal of 11191026791 is 19762019111.

It is not a de Polignac number, because 11191026791 - 2²⁶ = 11123917927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11191026731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 381380 + ... + 409673.

It is an arithmetic number, because the mean of its divisors is an integer number (835353024).

Almost surely, 2^11191026791 is an apocalyptic number.

11191026791 is a deficient number, since it is larger than the sum of its proper divisors (2174621593).

11191026791 is an equidigital number, since it uses as much as digits as its factorization.

11191026791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 791150.

The product of its (nonzero) digits is 6804, while the sum is 38.

The spelling of 11191026791 in words is "eleven billion, one hundred ninety-one million, twenty-six thousand, seven hundred ninety-one".