6818440335513 has 16 divisors (see below), whose sum is σ = 9486586576896. Its totient is φ = 4347963029520.

The previous prime is 6818440335493. The next prime is 6818440335589. The reversal of 6818440335513 is 3155330448186.

It is not a de Polignac number, because 6818440335513 - 2¹⁷ = 6818440204441 is a prime.

It is a super-2 number, since 2×6818440335513² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6818440335613) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18804456 + ... + 19163622.

It is an arithmetic number, because the mean of its divisors is an integer number (592911661056).

Almost surely, 2^{6818440335513} is an apocalyptic number.

It is an amenable number.

6818440335513 is a deficient number, since it is larger than the sum of its proper divisors (2668146241383).

6818440335513 is a wasteful number, since it uses less digits than its factorization.

6818440335513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634324.

The product of its (nonzero) digits is 4147200, while the sum is 51.

The spelling of 6818440335513 in words is "six trillion, eight hundred eighteen billion, four hundred forty million, three hundred thirty-five thousand, five hundred thirteen".