6856208863 has 4 divisors (see below), whose sum is σ = 7835667280. Its totient is φ = 5876750448.

The previous prime is 6856208809. The next prime is 6856208893. The reversal of 6856208863 is 3688026586.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6856208863 - 2¹³ = 6856200671 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6856208863.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6856208893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 489729198 + ... + 489729211.

It is an arithmetic number, because the mean of its divisors is an integer number (1958916820).

Almost surely, 2^6856208863 is an apocalyptic number.

6856208863 is a deficient number, since it is larger than the sum of its proper divisors (979458417).

6856208863 is an equidigital number, since it uses as much as digits as its factorization.

6856208863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 979458416.

The product of its (nonzero) digits is 3317760, while the sum is 52.

The square root of 6856208863 is about 82802.2274036152. The cubic root of 6856208863 is about 1899.7422423190.

The spelling of 6856208863 in words is "six billion, eight hundred fifty-six million, two hundred eight thousand, eight hundred sixty-three".