6856863837 has 16 divisors (see below), whose sum is σ = 9338965632. Its totient is φ = 4473943040.

The previous prime is 6856863833. The next prime is 6856863851. The reversal of 6856863837 is 7383686586.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 6856863837 - 2² = 6856863833 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6856863833) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 88308 + ... + 146669.

It is an arithmetic number, because the mean of its divisors is an integer number (583685352).

Almost surely, 2^6856863837 is an apocalyptic number.

It is an amenable number.

6856863837 is a deficient number, since it is larger than the sum of its proper divisors (2482101795).

6856863837 is a wasteful number, since it uses less digits than its factorization.

6856863837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235188.

The product of its digits is 34836480, while the sum is 60.

The square root of 6856863837 is about 82806.1823597731. The cubic root of 6856863837 is about 1899.8027345522.

The spelling of 6856863837 in words is "six billion, eight hundred fifty-six million, eight hundred sixty-three thousand, eight hundred thirty-seven".