11656446563 has 2 divisors, whose sum is σ = 11656446564. Its totient is φ = 11656446562.

The previous prime is 11656446541. The next prime is 11656446647. The reversal of 11656446563 is 36564465611.

11656446563 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (36564465611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11656446563 - 2¹⁴ = 11656430179 is a prime.

It is not a weakly prime, because it can be changed into another prime (11656446163) 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, 5828223281 + 5828223282.

It is an arithmetic number, because the mean of its divisors is an integer number (5828223282).

Almost surely, 2^11656446563 is an apocalyptic number.

11656446563 is a deficient number, since it is larger than the sum of its proper divisors (1).

11656446563 is an equidigital number, since it uses as much as digits as its factorization.

11656446563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1555200, while the sum is 47.

The spelling of 11656446563 in words is "eleven billion, six hundred fifty-six million, four hundred forty-six thousand, five hundred sixty-three".