6728659969865 has 32 divisors (see below), whose sum is σ = 8477888025600. Its totient is φ = 5119927004160.

The previous prime is 6728659969751. The next prime is 6728659969891. The reversal of 6728659969865 is 5689699568276.

It is not a de Polignac number, because 6728659969865 - 2⁸ = 6728659969609 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45367469 + ... + 45515541.

It is an arithmetic number, because the mean of its divisors is an integer number (264934000800).

Almost surely, 2^{6728659969865} is an apocalyptic number.

It is an amenable number.

6728659969865 is a deficient number, since it is larger than the sum of its proper divisors (1749228055735).

6728659969865 is a wasteful number, since it uses less digits than its factorization.

6728659969865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153137.

The product of its digits is 21163161600, while the sum is 86.

The spelling of 6728659969865 in words is "six trillion, seven hundred twenty-eight billion, six hundred fifty-nine million, nine hundred sixty-nine thousand, eight hundred sixty-five".