11965856783 has 2 divisors, whose sum is σ = 11965856784. Its totient is φ = 11965856782.

The previous prime is 11965856737. The next prime is 11965856797. The reversal of 11965856783 is 38765856911.

It is a happy number.

11965856783 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11965856783 - 2¹⁴ = 11965840399 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11965856983) 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 as a sum of consecutive naturals, namely, 5982928391 + 5982928392.

It is an arithmetic number, because the mean of its divisors is an integer number (5982928392).

Almost surely, 2^11965856783 is an apocalyptic number.

11965856783 is a deficient number, since it is larger than the sum of its proper divisors (1).

11965856783 is an equidigital number, since it uses as much as digits as its factorization.

11965856783 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10886400, while the sum is 59.

The spelling of 11965856783 in words is "eleven billion, nine hundred sixty-five million, eight hundred fifty-six thousand, seven hundred eighty-three".