11521881366 has 32 divisors (see below), whose sum is σ = 23879197440. Its totient is φ = 3701841696.

The previous prime is 11521881341. The next prime is 11521881389. The reversal of 11521881366 is 66318812511.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45735 + ... + 158541.

It is an arithmetic number, because the mean of its divisors is an integer number (746224920).

Almost surely, 2^11521881366 is an apocalyptic number.

11521881366 is an abundant number, since it is smaller than the sum of its proper divisors (12357316074).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11521881366 is a wasteful number, since it uses less digits than its factorization.

11521881366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113428.

The product of its digits is 69120, while the sum is 42.

The spelling of 11521881366 in words is "eleven billion, five hundred twenty-one million, eight hundred eighty-one thousand, three hundred sixty-six".