11991241888 has 48 divisors (see below), whose sum is σ = 23956128000. Its totient is φ = 5907462912.

The previous prime is 11991241849. The next prime is 11991241921. The reversal of 11991241888 is 88814219911.

11991241888 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1282093 + ... + 1291411.

It is an arithmetic number, because the mean of its divisors is an integer number (499086000).

Almost surely, 2^11991241888 is an apocalyptic number.

It is an amenable number.

11991241888 is a deficient number, since it is larger than the sum of its proper divisors (11964886112).

11991241888 is an equidigital number, since it uses as much as digits as its factorization.

11991241888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9917 (or 9909 counting only the distinct ones).

The product of its digits is 331776, while the sum is 52.

The spelling of 11991241888 in words is "eleven billion, nine hundred ninety-one million, two hundred forty-one thousand, eight hundred eighty-eight".