6404563 has 16 divisors (see below), whose sum is σ = 7659360. Its totient is φ = 5286400.

The previous prime is 6404551. The next prime is 6404581. The reversal of 6404563 is 3654046.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6404563 is a prime.

It is a Duffinian number.

6404563 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6404063) 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 15 ways as a sum of consecutive naturals, for example, 4833 + ... + 6013.

It is an arithmetic number, because the mean of its divisors is an integer number (478710).

Almost surely, 2^6404563 is an apocalyptic number.

6404563 is a deficient number, since it is larger than the sum of its proper divisors (1254797).

6404563 is a wasteful number, since it uses less digits than its factorization.

6404563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1238.

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 6404563 is about 2530.7238095059. The cubic root of 6404563 is about 185.7076669661.

The spelling of 6404563 in words is "six million, four hundred four thousand, five hundred sixty-three".