6856209206 has 24 divisors (see below), whose sum is σ = 12919141200. Its totient is φ = 2671249680.

The previous prime is 6856209167. The next prime is 6856209211. The reversal of 6856209206 is 6029026586.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2021981 + ... + 2025368.

It is an arithmetic number, because the mean of its divisors is an integer number (538297550).

Almost surely, 2^6856209206 is an apocalyptic number.

6856209206 is a deficient number, since it is larger than the sum of its proper divisors (6062931994).

6856209206 is a wasteful number, since it uses less digits than its factorization.

6856209206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4047380 (or 4047369 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 44.

The square root of 6856209206 is about 82802.2294748155. The cubic root of 6856209206 is about 1899.7422739989.

The spelling of 6856209206 in words is "six billion, eight hundred fifty-six million, two hundred nine thousand, two hundred six".