68148035209 has 2 divisors, whose sum is σ = 68148035210. Its totient is φ = 68148035208.

The previous prime is 68148035177. The next prime is 68148035213. The reversal of 68148035209 is 90253084186.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53562159225 + 14585875984 = 231435^2 + 120772^2 .

It is a cyclic number.

It is not a de Polignac number, because 68148035209 - 2⁵ = 68148035177 is a prime.

It is not a weakly prime, because it can be changed into another prime (68148035309) 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, 34074017604 + 34074017605.

It is an arithmetic number, because the mean of its divisors is an integer number (34074017605).

Almost surely, 2^68148035209 is an apocalyptic number.

It is an amenable number.

68148035209 is a deficient number, since it is larger than the sum of its proper divisors (1).

68148035209 is an equidigital number, since it uses as much as digits as its factorization.

68148035209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 414720, while the sum is 46.

The spelling of 68148035209 in words is "sixty-eight billion, one hundred forty-eight million, thirty-five thousand, two hundred nine".