65544563 has 4 divisors (see below), whose sum is σ = 74908080. Its totient is φ = 56181048.

The previous prime is 65544551. The next prime is 65544581. The reversal of 65544563 is 36544556.

It is a happy number.

65544563 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 65544563 - 2¹⁴ = 65528179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65544533) 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 in 3 ways as a sum of consecutive naturals, for example, 4681748 + ... + 4681761.

It is an arithmetic number, because the mean of its divisors is an integer number (18727020).

Almost surely, 2^65544563 is an apocalyptic number.

65544563 is a deficient number, since it is larger than the sum of its proper divisors (9363517).

65544563 is an equidigital number, since it uses as much as digits as its factorization.

65544563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9363516.

The product of its digits is 216000, while the sum is 38.

The square root of 65544563 is about 8095.9596713422. The cubic root of 65544563 is about 403.1922949411.

The spelling of 65544563 in words is "sixty-five million, five hundred forty-four thousand, five hundred sixty-three".