6856837506 has 24 divisors (see below), whose sum is σ = 14863674540. Its totient is φ = 2284505856.

The previous prime is 6856837483. The next prime is 6856837523. The reversal of 6856837506 is 6057386586.

6856837506 is a `hidden beast` number, since 6 + 8 + 56 + 83 + 7 + 506 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 5854545225 + 1002292281 = 76515^2 + 31659^2 .

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 11 ways as a sum of consecutive naturals, for example, 53575 + ... + 128778.

Almost surely, 2^6856837506 is an apocalyptic number.

6856837506 is an abundant number, since it is smaller than the sum of its proper divisors (8006837034).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6856837506 is a wasteful number, since it uses less digits than its factorization.

6856837506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184450 (or 184447 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 54.

The square root of 6856837506 is about 82806.0233678686. The cubic root of 6856837506 is about 1899.8003027422.

The spelling of 6856837506 in words is "six billion, eight hundred fifty-six million, eight hundred thirty-seven thousand, five hundred six".