5643

5643 is a natural number that comes after 5642 and before 5644. It is an odd, composite integer.

The prime factorization is 3^3 × 11 × 19. Therefore it has 16 positive divisors. Its digit sum is 18, so it is divisible by 9, hence by 3 as well. It is also divisible by 11 and by 19. The sum of all divisors is 9600; the sum of proper divisors is 3957.

In binary the value is 1011000001011_2, and in hexadecimal it is 0x160B.

There is no widely recognized mathematical constant or famous object specifically associated with 5643. It may appear as a catalog or identification number in various domains, but nothing notable stands out.