11784311889 has 24 divisors (see below), whose sum is σ = 19352871648. Its totient is φ = 6337779840.

The previous prime is 11784311887. The next prime is 11784311897. The reversal of 11784311889 is 98811348711.

11784311889 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 11784311889 - 2¹ = 11784311887 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (11784311887) 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, 2355307 + ... + 2360304.

It is an arithmetic number, because the mean of its divisors is an integer number (806369652).

Almost surely, 2^11784311889 is an apocalyptic number.

It is an amenable number.

11784311889 is a deficient number, since it is larger than the sum of its proper divisors (7568559759).

11784311889 is a wasteful number, since it uses less digits than its factorization.

11784311889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4715645 (or 4715638 counting only the distinct ones).

The product of its digits is 387072, while the sum is 51.

The spelling of 11784311889 in words is "eleven billion, seven hundred eighty-four million, three hundred eleven thousand, eight hundred eighty-nine".