11856340789 has 2 divisors, whose sum is σ = 11856340790. Its totient is φ = 11856340788.

The previous prime is 11856340747. The next prime is 11856340799. The reversal of 11856340789 is 98704365811.

11856340789 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 can be written as a sum of positive squares in only one way, i.e., 9876980689 + 1979360100 = 99383^2 + 44490^2 .

It is a cyclic number.

It is not a de Polignac number, because 11856340789 - 2¹⁵ = 11856308021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11856340709) 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, 5928170394 + 5928170395.

It is an arithmetic number, because the mean of its divisors is an integer number (5928170395).

Almost surely, 2^11856340789 is an apocalyptic number.

It is an amenable number.

11856340789 is a deficient number, since it is larger than the sum of its proper divisors (1).

11856340789 is an equidigital number, since it uses as much as digits as its factorization.

11856340789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1451520, while the sum is 52.

The spelling of 11856340789 in words is "eleven billion, eight hundred fifty-six million, three hundred forty thousand, seven hundred eighty-nine".