68368984289 has 2 divisors, whose sum is σ = 68368984290. Its totient is φ = 68368984288.

The previous prime is 68368984163. The next prime is 68368984291. The reversal of 68368984289 is 98248986386.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68208201889 + 160782400 = 261167^2 + 12680^2 .

It is a cyclic number.

It is not a de Polignac number, because 68368984289 - 2²⁸ = 68100548833 is a prime.

Together with 68368984291, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68368924289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34184492144 + 34184492145.

It is an arithmetic number, because the mean of its divisors is an integer number (34184492145).

Almost surely, 2^68368984289 is an apocalyptic number.

It is an amenable number.

68368984289 is a deficient number, since it is larger than the sum of its proper divisors (1).

68368984289 is an equidigital number, since it uses as much as digits as its factorization.

68368984289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 286654464, while the sum is 71.

The spelling of 68368984289 in words is "sixty-eight billion, three hundred sixty-eight million, nine hundred eighty-four thousand, two hundred eighty-nine".