11161887911 has 4 divisors (see below), whose sum is σ = 11217978000. Its totient is φ = 11105797824.

The previous prime is 11161887899. The next prime is 11161887917. The reversal of 11161887911 is 11978816111.

11161887911 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11161887911 - 2¹⁸ = 11161625767 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 (11161887917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28044746 + ... + 28045143.

It is an arithmetic number, because the mean of its divisors is an integer number (2804494500).

Almost surely, 2^11161887911 is an apocalyptic number.

11161887911 is a deficient number, since it is larger than the sum of its proper divisors (56090089).

11161887911 is an equidigital number, since it uses as much as digits as its factorization.

11161887911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56090088.

The product of its digits is 24192, while the sum is 44.

The spelling of 11161887911 in words is "eleven billion, one hundred sixty-one million, eight hundred eighty-seven thousand, nine hundred eleven".