68395313549 has 2 divisors, whose sum is σ = 68395313550. Its totient is φ = 68395313548.

The previous prime is 68395313543. The next prime is 68395313587. The reversal of 68395313549 is 94531359386.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50514810025 + 17880503524 = 224755^2 + 133718^2 .

It is a cyclic number.

It is not a de Polignac number, because 68395313549 - 2⁴ = 68395313533 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68395313494 and 68395313503.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68395313543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34197656774 + 34197656775.

It is an arithmetic number, because the mean of its divisors is an integer number (34197656775).

Almost surely, 2^68395313549 is an apocalyptic number.

It is an amenable number.

68395313549 is a deficient number, since it is larger than the sum of its proper divisors (1).

68395313549 is an equidigital number, since it uses as much as digits as its factorization.

68395313549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10497600, while the sum is 56.

The spelling of 68395313549 in words is "sixty-eight billion, three hundred ninety-five million, three hundred thirteen thousand, five hundred forty-nine".