6728558856 has 16 divisors (see below), whose sum is σ = 16821397200. Its totient is φ = 2242852944.

The previous prime is 6728558833. The next prime is 6728558861. The reversal of 6728558856 is 6588558276.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 6728558856.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140178286 + ... + 140178333.

It is an arithmetic number, because the mean of its divisors is an integer number (1051337325).

Almost surely, 2^6728558856 is an apocalyptic number.

It is an amenable number.

6728558856 is an abundant number, since it is smaller than the sum of its proper divisors (10092838344).

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

6728558856 is a wasteful number, since it uses less digits than its factorization.

6728558856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280356628 (or 280356624 counting only the distinct ones).

The product of its digits is 32256000, while the sum is 60.

The square root of 6728558856 is about 82027.7931923077. The cubic root of 6728558856 is about 1887.8784042930.

The spelling of 6728558856 in words is "six billion, seven hundred twenty-eight million, five hundred fifty-eight thousand, eight hundred fifty-six".