6831385870864 has 45 divisors (see below), whose sum is σ = 13421105722029. Its totient is φ = 3368526249600.

The previous prime is 6831385870847. The next prime is 6831385870871. The reversal of 6831385870864 is 4680785831386.

The square root of 6831385870864 is 2613692.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 3877827408400 + 2953558462464 = 1969220^2 + 1718592^2 .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6831385870864.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 763193589 + ... + 763202539.

Almost surely, 2^{6831385870864} is an apocalyptic number.

6831385870864 is the 2613692-nd square number.

It is an amenable number.

6831385870864 is a deficient number, since it is larger than the sum of its proper divisors (6589719851165).

6831385870864 is an frugal number, since it uses more digits than its factorization.

6831385870864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18056 (or 9026 counting only the distinct ones).

The product of its (nonzero) digits is 185794560, while the sum is 67.

The spelling of 6831385870864 in words is "six trillion, eight hundred thirty-one billion, three hundred eighty-five million, eight hundred seventy thousand, eight hundred sixty-four".