65436563 has 2 divisors, whose sum is σ = 65436564. Its totient is φ = 65436562.

The previous prime is 65436439. The next prime is 65436571. The reversal of 65436563 is 36563456.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65436563 - 2¹⁸ = 65174419 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (65426563) 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, 32718281 + 32718282.

It is an arithmetic number, because the mean of its divisors is an integer number (32718282).

Almost surely, 2^65436563 is an apocalyptic number.

65436563 is a deficient number, since it is larger than the sum of its proper divisors (1).

65436563 is an equidigital number, since it uses as much as digits as its factorization.

65436563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 194400, while the sum is 38.

The square root of 65436563 is about 8089.2869277829. The cubic root of 65436563 is about 402.9707219913.

The spelling of 65436563 in words is "sixty-five million, four hundred thirty-six thousand, five hundred sixty-three".