6316808138 has 4 divisors (see below), whose sum is σ = 9475212210. Its totient is φ = 3158404068.

The previous prime is 6316808137. The next prime is 6316808171. The reversal of 6316808138 is 8318086136.

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

It can be written as a sum of positive squares in only one way, i.e., 6255702649 + 61105489 = 79093^2 + 7817^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6316808137) 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 as a sum of consecutive naturals, namely, 1579202033 + ... + 1579202036.

Almost surely, 2^6316808138 is an apocalyptic number.

6316808138 is a deficient number, since it is larger than the sum of its proper divisors (3158404072).

6316808138 is a wasteful number, since it uses less digits than its factorization.

6316808138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3158404071.

The product of its (nonzero) digits is 165888, while the sum is 44.

The square root of 6316808138 is about 79478.3501212752. The cubic root of 6316808138 is about 1848.5557891529. Note that the first 3 decimals are identical.

The spelling of 6316808138 in words is "six billion, three hundred sixteen million, eight hundred eight thousand, one hundred thirty-eight".