128663447593139 has 2 divisors, whose sum is σ = 128663447593140. Its totient is φ = 128663447593138.

The previous prime is 128663447593123. The next prime is 128663447593151. The reversal of 128663447593139 is 931395744366821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128663447593139 - 2⁴ = 128663447593123 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (128663447592139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64331723796569 + 64331723796570.

It is an arithmetic number, because the mean of its divisors is an integer number (64331723796570).

Almost surely, 2^{128663447593139} is an apocalyptic number.

128663447593139 is a deficient number, since it is larger than the sum of its proper divisors (1).

128663447593139 is an equidigital number, since it uses as much as digits as its factorization.

128663447593139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 705438720, while the sum is 71.

The spelling of 128663447593139 in words is "one hundred twenty-eight trillion, six hundred sixty-three billion, four hundred forty-seven million, five hundred ninety-three thousand, one hundred thirty-nine".