68298656861 has 2 divisors, whose sum is σ = 68298656862. Its totient is φ = 68298656860.

The previous prime is 68298656801. The next prime is 68298656863. The reversal of 68298656861 is 16865689286.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47119384900 + 21179271961 = 217070^2 + 145531^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68298656861 is a prime.

Together with 68298656863, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68298656863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34149328430 + 34149328431.

It is an arithmetic number, because the mean of its divisors is an integer number (34149328431).

Almost surely, 2^68298656861 is an apocalyptic number.

It is an amenable number.

68298656861 is a deficient number, since it is larger than the sum of its proper divisors (1).

68298656861 is an equidigital number, since it uses as much as digits as its factorization.

68298656861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 59719680, while the sum is 65.

The spelling of 68298656861 in words is "sixty-eight billion, two hundred ninety-eight million, six hundred fifty-six thousand, eight hundred sixty-one".