68859166139 has 2 divisors, whose sum is σ = 68859166140. Its totient is φ = 68859166138.

The previous prime is 68859166099. The next prime is 68859166157. The reversal of 68859166139 is 93166195886.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68859166139 - 2⁸ = 68859165883 is a prime.

It is a super-2 number, since 2×68859166139² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (68859166169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34429583069 + 34429583070.

It is an arithmetic number, because the mean of its divisors is an integer number (34429583070).

Almost surely, 2^68859166139 is an apocalyptic number.

68859166139 is a deficient number, since it is larger than the sum of its proper divisors (1).

68859166139 is an equidigital number, since it uses as much as digits as its factorization.

68859166139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16796160, while the sum is 62.

The spelling of 68859166139 in words is "sixty-eight billion, eight hundred fifty-nine million, one hundred sixty-six thousand, one hundred thirty-nine".