128633425449839 has 2 divisors, whose sum is σ = 128633425449840. Its totient is φ = 128633425449838.

The previous prime is 128633425449833. The next prime is 128633425449857. The reversal of 128633425449839 is 938944524336821.

It is a weak prime.

It is an emirp because it is prime and its reverse (938944524336821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128633425449839 - 2⁸ = 128633425449583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128633425449833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64316712724919 + 64316712724920.

It is an arithmetic number, because the mean of its divisors is an integer number (64316712724920).

Almost surely, 2^{128633425449839} is an apocalyptic number.

128633425449839 is a deficient number, since it is larger than the sum of its proper divisors (1).

128633425449839 is an equidigital number, since it uses as much as digits as its factorization.

128633425449839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1074954240, while the sum is 71.

The spelling of 128633425449839 in words is "one hundred twenty-eight trillion, six hundred thirty-three billion, four hundred twenty-five million, four hundred forty-nine thousand, eight hundred thirty-nine".