11187528811 has 4 divisors (see below), whose sum is σ = 11290166800. Its totient is φ = 11084890824.

The previous prime is 11187528743. The next prime is 11187528823. The reversal of 11187528811 is 11882578111.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11187528811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11187528851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51318831 + ... + 51319048.

It is an arithmetic number, because the mean of its divisors is an integer number (2822541700).

Almost surely, 2^11187528811 is an apocalyptic number.

11187528811 is a deficient number, since it is larger than the sum of its proper divisors (102637989).

11187528811 is a wasteful number, since it uses less digits than its factorization.

11187528811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102637988.

The product of its digits is 35840, while the sum is 43.

The spelling of 11187528811 in words is "eleven billion, one hundred eighty-seven million, five hundred twenty-eight thousand, eight hundred eleven".