6543600728 has 24 divisors (see below), whose sum is σ = 14272395300. Its totient is φ = 2804400144.

The previous prime is 6543600727. The next prime is 6543600737. The reversal of 6543600728 is 8270063456.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6543600727) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8346038 + ... + 8346821.

Almost surely, 2^6543600728 is an apocalyptic number.

It is an amenable number.

6543600728 is an abundant number, since it is smaller than the sum of its proper divisors (7728794572).

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

6543600728 is a wasteful number, since it uses less digits than its factorization.

6543600728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16692879 (or 16692868 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 41.

The square root of 6543600728 is about 80892.5257857609. The cubic root of 6543600728 is about 1870.4191085932.

The spelling of 6543600728 in words is "six billion, five hundred forty-three million, six hundred thousand, seven hundred twenty-eight".