11491876191 has 16 divisors (see below), whose sum is σ = 16131251840. Its totient is φ = 7256990880.

The previous prime is 11491876177. The next prime is 11491876199. The reversal of 11491876191 is 19167819411.

It is not a de Polignac number, because 11491876191 - 2⁶ = 11491876127 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11491876191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11491876199) 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, 678081 + ... + 694821.

It is an arithmetic number, because the mean of its divisors is an integer number (1008203240).

Almost surely, 2^11491876191 is an apocalyptic number.

11491876191 is a deficient number, since it is larger than the sum of its proper divisors (4639375649).

11491876191 is a wasteful number, since it uses less digits than its factorization.

11491876191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28806.

The product of its digits is 108864, while the sum is 48.

The spelling of 11491876191 in words is "eleven billion, four hundred ninety-one million, eight hundred seventy-six thousand, one hundred ninety-one".