6856831506 has 16 divisors (see below), whose sum is σ = 15672757824. Its totient is φ = 1959094704.

The previous prime is 6856831489. The next prime is 6856831517. The reversal of 6856831506 is 6051386586.

It is a super-2 number, since 2×6856831506² = 94032276603348456072, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81628905 + ... + 81628988.

It is an arithmetic number, because the mean of its divisors is an integer number (979547364).

Almost surely, 2^6856831506 is an apocalyptic number.

6856831506 is an abundant number, since it is smaller than the sum of its proper divisors (8815926318).

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

6856831506 is a wasteful number, since it uses less digits than its factorization.

6856831506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163257905.

The product of its (nonzero) digits is 1036800, while the sum is 48.

The square root of 6856831506 is about 82805.9871386121. The cubic root of 6856831506 is about 1899.7997486089.

The spelling of 6856831506 in words is "six billion, eight hundred fifty-six million, eight hundred thirty-one thousand, five hundred six".