128663447591213 has 2 divisors, whose sum is σ = 128663447591214. Its totient is φ = 128663447591212.

The previous prime is 128663447591191. The next prime is 128663447591221. The reversal of 128663447591213 is 312195744366821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101554534940329 + 27108912650884 = 10077427^2 + 5206622^2 .

It is a cyclic number.

It is not a de Polignac number, because 128663447591213 - 2¹⁸ = 128663447329069 is a prime.

It is a super-2 number, since 2×128663447591213² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128663447591293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64331723795606 + 64331723795607.

It is an arithmetic number, because the mean of its divisors is an integer number (64331723795607).

Almost surely, 2^{128663447591213} is an apocalyptic number.

It is an amenable number.

128663447591213 is a deficient number, since it is larger than the sum of its proper divisors (1).

128663447591213 is an equidigital number, since it uses as much as digits as its factorization.

128663447591213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52254720, while the sum is 62.

The spelling of 128663447591213 in words is "one hundred twenty-eight trillion, six hundred sixty-three billion, four hundred forty-seven million, five hundred ninety-one thousand, two hundred thirteen".