128663447593193 has 2 divisors, whose sum is σ = 128663447593194. Its totient is φ = 128663447593192.

The previous prime is 128663447593181. The next prime is 128663447593267. The reversal of 128663447593193 is 391395744366821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121612659562969 + 7050788030224 = 11027813^2 + 2655332^2 .

It is a cyclic number.

It is not a de Polignac number, because 128663447593193 - 2¹⁴ = 128663447576809 is a prime.

It is a super-3 number, since 3×128663447593193³ (a number of 43 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (128663447593123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64331723796596 + 64331723796597.

It is an arithmetic number, because the mean of its divisors is an integer number (64331723796597).

Almost surely, 2^{128663447593193} is an apocalyptic number.

It is an amenable number.

128663447593193 is a deficient number, since it is larger than the sum of its proper divisors (1).

128663447593193 is an equidigital number, since it uses as much as digits as its factorization.

128663447593193 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 128663447593193 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 ninety-three".