6856444688 has 20 divisors (see below), whose sum is σ = 13287317340. Its totient is φ = 3427459584.

The previous prime is 6856444663. The next prime is 6856444703. The reversal of 6856444688 is 8864446586.

It can be written as a sum of positive squares in 2 ways, for example, as 3830124544 + 3026320144 = 61888^2 + 55012^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30356 + ... + 120972.

It is an arithmetic number, because the mean of its divisors is an integer number (664365867).

Almost surely, 2^6856444688 is an apocalyptic number.

It is an amenable number.

6856444688 is a deficient number, since it is larger than the sum of its proper divisors (6430872652).

6856444688 is a wasteful number, since it uses less digits than its factorization.

6856444688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95354 (or 95348 counting only the distinct ones).

The product of its digits is 35389440, while the sum is 59.

The square root of 6856444688 is about 82803.6514170722. The cubic root of 6856444688 is about 1899.7640231402.

The spelling of 6856444688 in words is "six billion, eight hundred fifty-six million, four hundred forty-four thousand, six hundred eighty-eight".