11981384688 has 80 divisors (see below), whose sum is σ = 38094672896. Its totient is φ = 3159924480.

The previous prime is 11981384683. The next prime is 11981384719. The reversal of 11981384688 is 88648318911.

11981384688 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11981384683) 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 15 ways as a sum of consecutive naturals, for example, 1367128 + ... + 1375863.

Almost surely, 2^11981384688 is an apocalyptic number.

It is an amenable number.

11981384688 is an abundant number, since it is smaller than the sum of its proper divisors (26113288208).

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

11981384688 is a wasteful number, since it uses less digits than its factorization.

11981384688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2743022 (or 2743016 counting only the distinct ones).

The product of its digits is 2654208, while the sum is 57.

The spelling of 11981384688 in words is "eleven billion, nine hundred eighty-one million, three hundred eighty-four thousand, six hundred eighty-eight".