128663447593267 has 2 divisors, whose sum is σ = 128663447593268. Its totient is φ = 128663447593266.

The previous prime is 128663447593193. The next prime is 128663447593283. The reversal of 128663447593267 is 762395744366821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128663447593267 - 2⁷ = 128663447593139 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128663447593267.

It is not a weakly prime, because it can be changed into another prime (128663447593567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64331723796633 + 64331723796634.

It is an arithmetic number, because the mean of its divisors is an integer number (64331723796634).

Almost surely, 2^{128663447593267} is an apocalyptic number.

128663447593267 is a deficient number, since it is larger than the sum of its proper divisors (1).

128663447593267 is an equidigital number, since it uses as much as digits as its factorization.

128663447593267 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2194698240, while the sum is 73.

The spelling of 128663447593267 in words is "one hundred twenty-eight trillion, six hundred sixty-three billion, four hundred forty-seven million, five hundred ninety-three thousand, two hundred sixty-seven".