8345539688813 has 2 divisors, whose sum is σ = 8345539688814. Its totient is φ = 8345539688812.

The previous prime is 8345539688723. The next prime is 8345539688887. The reversal of 8345539688813 is 3188869355438.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6496804547689 + 1848735141124 = 2548883^2 + 1359682^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8345539688813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8345539688413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4172769844406 + 4172769844407.

It is an arithmetic number, because the mean of its divisors is an integer number (4172769844407).

Almost surely, 2^{8345539688813} is an apocalyptic number.

It is an amenable number.

8345539688813 is a deficient number, since it is larger than the sum of its proper divisors (1).

8345539688813 is an equidigital number, since it uses as much as digits as its factorization.

8345539688813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 597196800, while the sum is 71.

The spelling of 8345539688813 in words is "eight trillion, three hundred forty-five billion, five hundred thirty-nine million, six hundred eighty-eight thousand, eight hundred thirteen".