68345409061 has 2 divisors, whose sum is σ = 68345409062. Its totient is φ = 68345409060.

The previous prime is 68345409059. The next prime is 68345409091. The reversal of 68345409061 is 16090454386.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41213060100 + 27132348961 = 203010^2 + 164719^2 .

It is a cyclic number.

It is not a de Polignac number, because 68345409061 - 2¹ = 68345409059 is a prime.

Together with 68345409059, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68345409091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34172704530 + 34172704531.

It is an arithmetic number, because the mean of its divisors is an integer number (34172704531).

Almost surely, 2^68345409061 is an apocalyptic number.

It is an amenable number.

68345409061 is a deficient number, since it is larger than the sum of its proper divisors (1).

68345409061 is an equidigital number, since it uses as much as digits as its factorization.

68345409061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 622080, while the sum is 46.

The spelling of 68345409061 in words is "sixty-eight billion, three hundred forty-five million, four hundred nine thousand, sixty-one".