11991712383 has 24 divisors (see below), whose sum is σ = 20837731200. Its totient is φ = 6491753424.

The previous prime is 11991712379. The next prime is 11991712451. The reversal of 11991712383 is 38321719911.

It is a happy number.

11991712383 is a `hidden beast` number, since 11 + 99 + 171 + 2 + 383 = 666.

11991712383 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11991712383 - 2² = 11991712379 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11991712303) 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 23 ways as a sum of consecutive naturals, for example, 5007873 + ... + 5010266.

It is an arithmetic number, because the mean of its divisors is an integer number (868238800).

Almost surely, 2^11991712383 is an apocalyptic number.

11991712383 is a deficient number, since it is larger than the sum of its proper divisors (8846018817).

11991712383 is a wasteful number, since it uses less digits than its factorization.

11991712383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10018171 (or 10018168 counting only the distinct ones).

The product of its digits is 81648, while the sum is 45.

The spelling of 11991712383 in words is "eleven billion, nine hundred ninety-one million, seven hundred twelve thousand, three hundred eighty-three".