68195627009 has 2 divisors, whose sum is σ = 68195627010. Its totient is φ = 68195627008.

The previous prime is 68195626981. The next prime is 68195627011. The reversal of 68195627009 is 90072659186.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45704026225 + 22491600784 = 213785^2 + 149972^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68195627009 is a prime.

Together with 68195627011, 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 (68195627029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34097813504 + 34097813505.

It is an arithmetic number, because the mean of its divisors is an integer number (34097813505).

Almost surely, 2^68195627009 is an apocalyptic number.

It is an amenable number.

68195627009 is a deficient number, since it is larger than the sum of its proper divisors (1).

68195627009 is an equidigital number, since it uses as much as digits as its factorization.

68195627009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1632960, while the sum is 53.

The spelling of 68195627009 in words is "sixty-eight billion, one hundred ninety-five million, six hundred twenty-seven thousand, nine".