68130786468709 has 2 divisors, whose sum is σ = 68130786468710. Its totient is φ = 68130786468708.

The previous prime is 68130786468707. The next prime is 68130786468911. The reversal of 68130786468709 is 90786468703186.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44176095180100 + 23954691288609 = 6646510^2 + 4894353^2 .

It is a cyclic number.

It is not a de Polignac number, because 68130786468709 - 2¹ = 68130786468707 is a prime.

It is a super-2 number, since 2×68130786468709² (a number of 28 digits) contains 22 as substring.

Together with 68130786468707, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68130786468707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34065393234354 + 34065393234355.

It is an arithmetic number, because the mean of its divisors is an integer number (34065393234355).

Almost surely, 2^{68130786468709} is an apocalyptic number.

It is an amenable number.

68130786468709 is a deficient number, since it is larger than the sum of its proper divisors (1).

68130786468709 is an equidigital number, since it uses as much as digits as its factorization.

68130786468709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 585252864, while the sum is 73.

The spelling of 68130786468709 in words is "sixty-eight trillion, one hundred thirty billion, seven hundred eighty-six million, four hundred sixty-eight thousand, seven hundred nine".