68378817473 has 2 divisors, whose sum is σ = 68378817474. Its totient is φ = 68378817472.

The previous prime is 68378817467. The next prime is 68378817487. The reversal of 68378817473 is 37471887386.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67484089729 + 894727744 = 259777^2 + 29912^2 .

It is a cyclic number.

It is not a de Polignac number, because 68378817473 - 2⁴ = 68378817457 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (68378817373) 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, 34189408736 + 34189408737.

It is an arithmetic number, because the mean of its divisors is an integer number (34189408737).

Almost surely, 2^68378817473 is an apocalyptic number.

It is an amenable number.

68378817473 is a deficient number, since it is larger than the sum of its proper divisors (1).

68378817473 is an equidigital number, since it uses as much as digits as its factorization.

68378817473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37933056, while the sum is 62.

The spelling of 68378817473 in words is "sixty-eight billion, three hundred seventy-eight million, eight hundred seventeen thousand, four hundred seventy-three".