68361228713 has 2 divisors, whose sum is σ = 68361228714. Its totient is φ = 68361228712.

The previous prime is 68361228709. The next prime is 68361228811. The reversal of 68361228713 is 31782216386.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43635867664 + 24725361049 = 208892^2 + 157243^2 .

It is a cyclic number.

It is not a de Polignac number, because 68361228713 - 2² = 68361228709 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (68361228913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34180614356 + 34180614357.

It is an arithmetic number, because the mean of its divisors is an integer number (34180614357).

Almost surely, 2^68361228713 is an apocalyptic number.

It is an amenable number.

68361228713 is a deficient number, since it is larger than the sum of its proper divisors (1).

68361228713 is an equidigital number, since it uses as much as digits as its factorization.

68361228713 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580608, while the sum is 47.

The spelling of 68361228713 in words is "sixty-eight billion, three hundred sixty-one million, two hundred twenty-eight thousand, seven hundred thirteen".