6543650 has 12 divisors (see below), whose sum is σ = 12171282. Its totient is φ = 2617440.

The previous prime is 6543643. The next prime is 6543659. The reversal of 6543650 is 563456.

It can be written as a sum of positive squares in 3 ways, for example, as 2666689 + 3876961 = 1633^2 + 1969^2 .

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

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

It is not an unprimeable number, because it can be changed into a prime (6543659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 65387 + ... + 65486.

Almost surely, 2^6543650 is an apocalyptic number.

6543650 is a deficient number, since it is larger than the sum of its proper divisors (5627632).

6543650 is a wasteful number, since it uses less digits than its factorization.

6543650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130885 (or 130880 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 6543650 is about 2558.0559024384. The cubic root of 6543650 is about 187.0423803208.

The spelling of 6543650 in words is "six million, five hundred forty-three thousand, six hundred fifty".