68829560209 has 2 divisors, whose sum is σ = 68829560210. Its totient is φ = 68829560208.

The previous prime is 68829560197. The next prime is 68829560273. The reversal of 68829560209 is 90206592886.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67783684609 + 1045875600 = 260353^2 + 32340^2 .

It is a cyclic number.

It is not a de Polignac number, because 68829560209 - 2¹⁹ = 68829035921 is a prime.

It is a super-2 number, since 2×68829560209² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 68829560209.

It is not a weakly prime, because it can be changed into another prime (68829560279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34414780104 + 34414780105.

It is an arithmetic number, because the mean of its divisors is an integer number (34414780105).

Almost surely, 2^68829560209 is an apocalyptic number.

It is an amenable number.

68829560209 is a deficient number, since it is larger than the sum of its proper divisors (1).

68829560209 is an equidigital number, since it uses as much as digits as its factorization.

68829560209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3732480, while the sum is 55.

The spelling of 68829560209 in words is "sixty-eight billion, eight hundred twenty-nine million, five hundred sixty thousand, two hundred nine".