128568385171 has 2 divisors, whose sum is σ = 128568385172. Its totient is φ = 128568385170.

The previous prime is 128568385117. The next prime is 128568385189. The reversal of 128568385171 is 171583865821.

Together with previous prime (128568385117) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128568385171 - 2²⁷ = 128434167443 is a prime.

It is a super-2 number, since 2×128568385171² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (128568385271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64284192585 + 64284192586.

It is an arithmetic number, because the mean of its divisors is an integer number (64284192586).

Almost surely, 2^128568385171 is an apocalyptic number.

128568385171 is a deficient number, since it is larger than the sum of its proper divisors (1).

128568385171 is an equidigital number, since it uses as much as digits as its factorization.

128568385171 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3225600, while the sum is 55.

The spelling of 128568385171 in words is "one hundred twenty-eight billion, five hundred sixty-eight million, three hundred eighty-five thousand, one hundred seventy-one".