6543984225 has 12 divisors (see below), whose sum is σ = 10819387376. Its totient is φ = 3490124880.

The previous prime is 6543984221. The next prime is 6543984259. The reversal of 6543984225 is 5224893456.

It is a happy number.

It is not a de Polignac number, because 6543984225 - 2² = 6543984221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6543984221) 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 11 ways as a sum of consecutive naturals, for example, 43626487 + ... + 43626636.

Almost surely, 2^6543984225 is an apocalyptic number.

It is an amenable number.

6543984225 is a deficient number, since it is larger than the sum of its proper divisors (4275403151).

6543984225 is a wasteful number, since it uses less digits than its factorization.

6543984225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87253136 (or 87253131 counting only the distinct ones).

The product of its digits is 2073600, while the sum is 48.

The square root of 6543984225 is about 80894.8961616244. The cubic root of 6543984225 is about 1870.4556474008.

The spelling of 6543984225 in words is "six billion, five hundred forty-three million, nine hundred eighty-four thousand, two hundred twenty-five".