68843550313 has 2 divisors, whose sum is σ = 68843550314. Its totient is φ = 68843550312.

The previous prime is 68843550287. The next prime is 68843550323. The reversal of 68843550313 is 31305534886.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39098339289 + 29745211024 = 197733^2 + 172468^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68843550313 is a prime.

It is not a weakly prime, because it can be changed into another prime (68843550323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34421775156 + 34421775157.

It is an arithmetic number, because the mean of its divisors is an integer number (34421775157).

Almost surely, 2^68843550313 is an apocalyptic number.

It is an amenable number.

68843550313 is a deficient number, since it is larger than the sum of its proper divisors (1).

68843550313 is an equidigital number, since it uses as much as digits as its factorization.

68843550313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1036800, while the sum is 46.

The spelling of 68843550313 in words is "sixty-eight billion, eight hundred forty-three million, five hundred fifty thousand, three hundred thirteen".