135611563 has 2 divisors, whose sum is σ = 135611564. Its totient is φ = 135611562.

The previous prime is 135611561. The next prime is 135611621. The reversal of 135611563 is 365116531.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 135611563 - 2¹ = 135611561 is a prime.

Together with 135611561, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (135611561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67805781 + 67805782.

It is an arithmetic number, because the mean of its divisors is an integer number (67805782).

Almost surely, 2^135611563 is an apocalyptic number.

135611563 is a deficient number, since it is larger than the sum of its proper divisors (1).

135611563 is an equidigital number, since it uses as much as digits as its factorization.

135611563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8100, while the sum is 31.

The square root of 135611563 is about 11645.2377820292. The cubic root of 135611563 is about 513.7662527837.

The spelling of 135611563 in words is "one hundred thirty-five million, six hundred eleven thousand, five hundred sixty-three".