6728959816 has 16 divisors (see below), whose sum is σ = 12671898300. Its totient is φ = 3349786944.

The previous prime is 6728959793. The next prime is 6728959817. The reversal of 6728959816 is 6189598276.

It can be written as a sum of positive squares in 2 ways, for example, as 6712524900 + 16434916 = 81930^2 + 4054^2 .

It is not an unprimeable number, because it can be changed into a prime (6728959817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1834675 + ... + 1838338.

Almost surely, 2^6728959816 is an apocalyptic number.

It is an amenable number.

6728959816 is a deficient number, since it is larger than the sum of its proper divisors (5942938484).

6728959816 is a wasteful number, since it uses less digits than its factorization.

6728959816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3673248 (or 3673244 counting only the distinct ones).

The product of its digits is 13063680, while the sum is 61.

The square root of 6728959816 is about 82030.2372055573. The cubic root of 6728959816 is about 1887.9159035904.

The spelling of 6728959816 in words is "six billion, seven hundred twenty-eight million, nine hundred fifty-nine thousand, eight hundred sixteen".