128828663839 has 2 divisors, whose sum is σ = 128828663840. Its totient is φ = 128828663838.

The previous prime is 128828663801. The next prime is 128828663861. The reversal of 128828663839 is 938366828821.

It is a strong prime.

It is an emirp because it is prime and its reverse (938366828821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128828663839 - 2²⁵ = 128795109407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128828661839) 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, 64414331919 + 64414331920.

It is an arithmetic number, because the mean of its divisors is an integer number (64414331920).

Almost surely, 2^128828663839 is an apocalyptic number.

128828663839 is a deficient number, since it is larger than the sum of its proper divisors (1).

128828663839 is an equidigital number, since it uses as much as digits as its factorization.

128828663839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47775744, while the sum is 64.

The spelling of 128828663839 in words is "one hundred twenty-eight billion, eight hundred twenty-eight million, six hundred sixty-three thousand, eight hundred thirty-nine".