68989181713 has 2 divisors, whose sum is σ = 68989181714. Its totient is φ = 68989181712.

The previous prime is 68989181711. The next prime is 68989181777. The reversal of 68989181713 is 31718198986.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59344370449 + 9644811264 = 243607^2 + 98208^2 .

It is a cyclic number.

It is not a de Polignac number, because 68989181713 - 2¹ = 68989181711 is a prime.

It is a super-2 number, since 2×68989181713² (a number of 22 digits) contains 22 as substring.

Together with 68989181711, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (68989181711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34494590856 + 34494590857.

It is an arithmetic number, because the mean of its divisors is an integer number (34494590857).

Almost surely, 2^68989181713 is an apocalyptic number.

It is an amenable number.

68989181713 is a deficient number, since it is larger than the sum of its proper divisors (1).

68989181713 is an equidigital number, since it uses as much as digits as its factorization.

68989181713 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5225472, while the sum is 61.

The spelling of 68989181713 in words is "sixty-eight billion, nine hundred eighty-nine million, one hundred eighty-one thousand, seven hundred thirteen".