68756881213 has 2 divisors, whose sum is σ = 68756881214. Its totient is φ = 68756881212.

The previous prime is 68756881201. The next prime is 68756881261. The reversal of 68756881213 is 31218865786.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55732822084 + 13024059129 = 236078^2 + 114123^2 .

It is a cyclic number.

It is not a de Polignac number, because 68756881213 - 2¹⁷ = 68756750141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68756881273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34378440606 + 34378440607.

It is an arithmetic number, because the mean of its divisors is an integer number (34378440607).

Almost surely, 2^68756881213 is an apocalyptic number.

It is an amenable number.

68756881213 is a deficient number, since it is larger than the sum of its proper divisors (1).

68756881213 is an equidigital number, since it uses as much as digits as its factorization.

68756881213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3870720, while the sum is 55.

The spelling of 68756881213 in words is "sixty-eight billion, seven hundred fifty-six million, eight hundred eighty-one thousand, two hundred thirteen".