68747084849 has 2 divisors, whose sum is σ = 68747084850. Its totient is φ = 68747084848.

The previous prime is 68747084827. The next prime is 68747084867. The reversal of 68747084849 is 94848074786.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62771794849 + 5975290000 = 250543^2 + 77300^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68747084849 is a prime.

It is not a weakly prime, because it can be changed into another prime (68747684849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34373542424 + 34373542425.

It is an arithmetic number, because the mean of its divisors is an integer number (34373542425).

Almost surely, 2^68747084849 is an apocalyptic number.

It is an amenable number.

68747084849 is a deficient number, since it is larger than the sum of its proper divisors (1).

68747084849 is an equidigital number, since it uses as much as digits as its factorization.

68747084849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 86704128, while the sum is 65.

The spelling of 68747084849 in words is "sixty-eight billion, seven hundred forty-seven million, eighty-four thousand, eight hundred forty-nine".