6543856 has 20 divisors (see below), whose sum is σ = 13831704. Its totient is φ = 2974400.

The previous prime is 6543853. The next prime is 6543871. The reversal of 6543856 is 6583456.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6543853) 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, 18415 + ... + 18766.

Almost surely, 2^6543856 is an apocalyptic number.

It is an amenable number.

6543856 is an abundant number, since it is smaller than the sum of its proper divisors (7287848).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6543856 is a wasteful number, since it uses less digits than its factorization.

6543856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37200 (or 37194 counting only the distinct ones).

The product of its digits is 86400, while the sum is 37.

The square root of 6543856 is about 2558.0961670743. The cubic root of 6543856 is about 187.0443430545.

The spelling of 6543856 in words is "six million, five hundred forty-three thousand, eight hundred fifty-six".