11655563 has 2 divisors, whose sum is σ = 11655564. Its totient is φ = 11655562.

The previous prime is 11655551. The next prime is 11655613. The reversal of 11655563 is 36555611.

It is a weak prime.

It is an emirp because it is prime and its reverse (36555611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11655563 - 2⁴ = 11655547 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11615563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5827781 + 5827782.

It is an arithmetic number, because the mean of its divisors is an integer number (5827782).

Almost surely, 2^11655563 is an apocalyptic number.

11655563 is a deficient number, since it is larger than the sum of its proper divisors (1).

11655563 is an equidigital number, since it uses as much as digits as its factorization.

11655563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13500, while the sum is 32.

The square root of 11655563 is about 3414.0244580260. The cubic root of 11655563 is about 226.7310949587.

The spelling of 11655563 in words is "eleven million, six hundred fifty-five thousand, five hundred sixty-three".