6728218845 has 16 divisors (see below), whose sum is σ = 10775843520. Its totient is φ = 3584818944.

The previous prime is 6728218841. The next prime is 6728218897. The reversal of 6728218845 is 5488128276.

It is not a de Polignac number, because 6728218845 - 2² = 6728218841 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6728218841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 207139 + ... + 237408.

It is an arithmetic number, because the mean of its divisors is an integer number (673490220).

Almost surely, 2^6728218845 is an apocalyptic number.

It is an amenable number.

6728218845 is a deficient number, since it is larger than the sum of its proper divisors (4047624675).

6728218845 is a wasteful number, since it uses less digits than its factorization.

6728218845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445564.

The product of its digits is 1720320, while the sum is 51.

The square root of 6728218845 is about 82025.7206307875. The cubic root of 6728218845 is about 1887.8466040095.

The spelling of 6728218845 in words is "six billion, seven hundred twenty-eight million, two hundred eighteen thousand, eight hundred forty-five".