68030218721 has 2 divisors, whose sum is σ = 68030218722. Its totient is φ = 68030218720.

The previous prime is 68030218691. The next prime is 68030218799. The reversal of 68030218721 is 12781203086.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62880577600 + 5149641121 = 250760^2 + 71761^2 .

It is a cyclic number.

It is not a de Polignac number, because 68030218721 - 2¹⁴ = 68030202337 is a prime.

It is a super-2 number, since 2×68030218721² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (68030218121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34015109360 + 34015109361.

It is an arithmetic number, because the mean of its divisors is an integer number (34015109361).

Almost surely, 2^68030218721 is an apocalyptic number.

It is an amenable number.

68030218721 is a deficient number, since it is larger than the sum of its proper divisors (1).

68030218721 is an equidigital number, since it uses as much as digits as its factorization.

68030218721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 38.

The spelling of 68030218721 in words is "sixty-eight billion, thirty million, two hundred eighteen thousand, seven hundred twenty-one".