6543563 has 4 divisors (see below), whose sum is σ = 7046928. Its totient is φ = 6040200.

The previous prime is 6543541. The next prime is 6543577. The reversal of 6543563 is 3653456.

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

It is a cyclic number.

It is not a de Polignac number, because 6543563 - 2⁶ = 6543499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6543503) 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, 251663 + ... + 251688.

It is an arithmetic number, because the mean of its divisors is an integer number (1761732).

Almost surely, 2^6543563 is an apocalyptic number.

6543563 is a deficient number, since it is larger than the sum of its proper divisors (503365).

6543563 is a wasteful number, since it uses less digits than its factorization.

6543563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503364.

The product of its digits is 32400, while the sum is 32.

The square root of 6543563 is about 2558.0388972805. The cubic root of 6543563 is about 187.0415513870.

The spelling of 6543563 in words is "six million, five hundred forty-three thousand, five hundred sixty-three".