6816740534138 has 8 divisors (see below), whose sum is σ = 10264897225332. Its totient is φ = 3395108125696.

The previous prime is 6816740534137. The next prime is 6816740534143. The reversal of 6816740534138 is 8314350476186.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 5016224734249 + 1800515799889 = 2239693^2 + 1341833^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (6816740534137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6631070045 + ... + 6631071072.

Almost surely, 2^{6816740534138} is an apocalyptic number.

6816740534138 is a deficient number, since it is larger than the sum of its proper divisors (3448156691194).

6816740534138 is a wasteful number, since it uses less digits than its factorization.

6816740534138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13262141376.

The product of its (nonzero) digits is 11612160, while the sum is 56.

The spelling of 6816740534138 in words is "six trillion, eight hundred sixteen billion, seven hundred forty million, five hundred thirty-four thousand, one hundred thirty-eight".