68026293312821 has 2 divisors, whose sum is σ = 68026293312822. Its totient is φ = 68026293312820.

The previous prime is 68026293312799. The next prime is 68026293312889. The reversal of 68026293312821 is 12821339262086.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46184120892100 + 21842172420721 = 6795890^2 + 4673561^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68026293312821 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68026293312121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34013146656410 + 34013146656411.

It is an arithmetic number, because the mean of its divisors is an integer number (34013146656411).

Almost surely, 2^{68026293312821} is an apocalyptic number.

It is an amenable number.

68026293312821 is a deficient number, since it is larger than the sum of its proper divisors (1).

68026293312821 is an equidigital number, since it uses as much as digits as its factorization.

68026293312821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2985984, while the sum is 53.

The spelling of 68026293312821 in words is "sixty-eight trillion, twenty-six billion, two hundred ninety-three million, three hundred twelve thousand, eight hundred twenty-one".