2818813681268 has 12 divisors (see below), whose sum is σ = 5312379630180. Its totient is φ = 1300990929792.

The previous prime is 2818813681261. The next prime is 2818813681291. The reversal of 2818813681268 is 8621863188182.

It can be written as a sum of positive squares in 2 ways, for example, as 1099599709924 + 1719213971344 = 1048618^2 + 1311188^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2818813681268.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2818813681261) 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, 27103977653 + ... + 27103977756.

It is an arithmetic number, because the mean of its divisors is an integer number (442698302515).

Almost surely, 2^{2818813681268} is an apocalyptic number.

It is an amenable number.

2818813681268 is a deficient number, since it is larger than the sum of its proper divisors (2493565948912).

2818813681268 is a wasteful number, since it uses less digits than its factorization.

2818813681268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54207955426 (or 54207955424 counting only the distinct ones).

The product of its digits is 14155776, while the sum is 62.

The spelling of 2818813681268 in words is "two trillion, eight hundred eighteen billion, eight hundred thirteen million, six hundred eighty-one thousand, two hundred sixty-eight".