128810666787743 has 2 divisors, whose sum is σ = 128810666787744. Its totient is φ = 128810666787742.

The previous prime is 128810666787721. The next prime is 128810666787793. The reversal of 128810666787743 is 347787666018821.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128810666787743 - 2²⁰ = 128810665739167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128810666787793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64405333393871 + 64405333393872.

It is an arithmetic number, because the mean of its divisors is an integer number (64405333393872).

Almost surely, 2^{128810666787743} is an apocalyptic number.

128810666787743 is a deficient number, since it is larger than the sum of its proper divisors (1).

128810666787743 is an equidigital number, since it uses as much as digits as its factorization.

128810666787743 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 910393344, while the sum is 74.

The spelling of 128810666787743 in words is "one hundred twenty-eight trillion, eight hundred ten billion, six hundred sixty-six million, seven hundred eighty-seven thousand, seven hundred forty-three".