68017421909573 has 2 divisors, whose sum is σ = 68017421909574. Its totient is φ = 68017421909572.

The previous prime is 68017421909531. The next prime is 68017421909669. The reversal of 68017421909573 is 37590912471086.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61280370799684 + 6737051109889 = 7828178^2 + 2595583^2 .

It is a cyclic number.

It is not a de Polignac number, because 68017421909573 - 2¹⁰ = 68017421908549 is a prime.

It is a super-2 number, since 2×68017421909573² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68017421909473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34008710954786 + 34008710954787.

It is an arithmetic number, because the mean of its divisors is an integer number (34008710954787).

It is a 1-persistent number, because it is pandigital, but 2⋅68017421909573 = 136034843819146 is not.

Almost surely, 2^{68017421909573} is an apocalyptic number.

It is an amenable number.

68017421909573 is a deficient number, since it is larger than the sum of its proper divisors (1).

68017421909573 is an equidigital number, since it uses as much as digits as its factorization.

68017421909573 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22861440, while the sum is 62.

The spelling of 68017421909573 in words is "sixty-eight trillion, seventeen billion, four hundred twenty-one million, nine hundred nine thousand, five hundred seventy-three".