6783440038713 has 24 divisors (see below), whose sum is σ = 10597305510792. Its totient is φ = 4156508636928.

The previous prime is 6783440038709. The next prime is 6783440038747. The reversal of 6783440038713 is 3178300443876.

6783440038713 is a `hidden beast` number, since 67 + 83 + 4 + 400 + 38 + 71 + 3 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 648545134329 + 6134894904384 = 805323^2 + 2476872^2 .

It is not a de Polignac number, because 6783440038713 - 2² = 6783440038709 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6783440038713.

It is not an unprimeable number, because it can be changed into a prime (6783440038913) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 124389306 + ... + 124443827.

It is an arithmetic number, because the mean of its divisors is an integer number (441554396283).

Almost surely, 2^{6783440038713} is an apocalyptic number.

It is an amenable number.

6783440038713 is a deficient number, since it is larger than the sum of its proper divisors (3813865472079).

6783440038713 is a wasteful number, since it uses less digits than its factorization.

6783440038713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248833385 (or 248833382 counting only the distinct ones).

The product of its (nonzero) digits is 8128512, while the sum is 54.

The spelling of 6783440038713 in words is "six trillion, seven hundred eighty-three billion, four hundred forty million, thirty-eight thousand, seven hundred thirteen".