6728605768 has 16 divisors (see below), whose sum is σ = 12757891500. Its totient is φ = 3326501376.

The previous prime is 6728605739. The next prime is 6728605777. The reversal of 6728605768 is 8675068276.

It can be written as a sum of positive squares in 2 ways, for example, as 6262823044 + 465782724 = 79138^2 + 21582^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 4724433 + ... + 4725856.

Almost surely, 2^6728605768 is an apocalyptic number.

It is an amenable number.

6728605768 is a deficient number, since it is larger than the sum of its proper divisors (6029285732).

6728605768 is a wasteful number, since it uses less digits than its factorization.

6728605768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9450384 (or 9450380 counting only the distinct ones).

The product of its (nonzero) digits is 6773760, while the sum is 55.

The square root of 6728605768 is about 82028.0791436688. The cubic root of 6728605768 is about 1887.8827917578.

The spelling of 6728605768 in words is "six billion, seven hundred twenty-eight million, six hundred five thousand, seven hundred sixty-eight".