11561710879 has 2 divisors, whose sum is σ = 11561710880. Its totient is φ = 11561710878.

The previous prime is 11561710861. The next prime is 11561710889. The reversal of 11561710879 is 97801716511.

11561710879 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 11561710879 - 2¹⁹ = 11561186591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11561710889) 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, 5780855439 + 5780855440.

It is an arithmetic number, because the mean of its divisors is an integer number (5780855440).

Almost surely, 2^11561710879 is an apocalyptic number.

11561710879 is a deficient number, since it is larger than the sum of its proper divisors (1).

11561710879 is an equidigital number, since it uses as much as digits as its factorization.

11561710879 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 105840, while the sum is 46.

The spelling of 11561710879 in words is "eleven billion, five hundred sixty-one million, seven hundred ten thousand, eight hundred seventy-nine".