128568564330671 has 2 divisors, whose sum is σ = 128568564330672. Its totient is φ = 128568564330670.

The previous prime is 128568564330541. The next prime is 128568564330707. The reversal of 128568564330671 is 176033465865821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128568564330671 - 2⁴² = 124170517819567 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 128568564330598 and 128568564330607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128568569330671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64284282165335 + 64284282165336.

It is an arithmetic number, because the mean of its divisors is an integer number (64284282165336).

Almost surely, 2^{128568564330671} is an apocalyptic number.

128568564330671 is a deficient number, since it is larger than the sum of its proper divisors (1).

128568564330671 is an equidigital number, since it uses as much as digits as its factorization.

128568564330671 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 174182400, while the sum is 65.

The spelling of 128568564330671 in words is "one hundred twenty-eight trillion, five hundred sixty-eight billion, five hundred sixty-four million, three hundred thirty thousand, six hundred seventy-one".