6728206811 has 4 divisors (see below), whose sum is σ = 6772764624. Its totient is φ = 6683649000.

The previous prime is 6728206787. The next prime is 6728206843. The reversal of 6728206811 is 1186028276.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6728206811 - 2²² = 6724012507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6728206871) 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, 22278680 + ... + 22278981.

It is an arithmetic number, because the mean of its divisors is an integer number (1693191156).

Almost surely, 2^6728206811 is an apocalyptic number.

6728206811 is a deficient number, since it is larger than the sum of its proper divisors (44557813).

6728206811 is a wasteful number, since it uses less digits than its factorization.

6728206811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44557812.

The product of its (nonzero) digits is 64512, while the sum is 41.

The square root of 6728206811 is about 82025.6472757149. The cubic root of 6728206811 is about 1887.8454784834.

The spelling of 6728206811 in words is "six billion, seven hundred twenty-eight million, two hundred six thousand, eight hundred eleven".