11839991472 has 120 divisors (see below), whose sum is σ = 34748594400. Its totient is φ = 3758275584.

The previous prime is 11839991467. The next prime is 11839991483. The reversal of 11839991472 is 27419993811.

11839991472 is a `hidden beast` number, since 1 + 1 + 83 + 9 + 9 + 91 + 472 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 285429 + ... + 324267.

It is an arithmetic number, because the mean of its divisors is an integer number (289571620).

Almost surely, 2^11839991472 is an apocalyptic number.

11839991472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11839991472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17374297200).

11839991472 is an abundant number, since it is smaller than the sum of its proper divisors (22908602928).

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

11839991472 is a wasteful number, since it uses less digits than its factorization.

11839991472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38955 (or 38946 counting only the distinct ones).

The product of its digits is 979776, while the sum is 54.

The spelling of 11839991472 in words is "eleven billion, eight hundred thirty-nine million, nine hundred ninety-one thousand, four hundred seventy-two".