128007808889 has 2 divisors, whose sum is σ = 128007808890. Its totient is φ = 128007808888.

The previous prime is 128007808829. The next prime is 128007808897. The reversal of 128007808889 is 988808700821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98116165225 + 29891643664 = 313235^2 + 172892^2 .

It is a cyclic number.

It is not a de Polignac number, because 128007808889 - 2⁸ = 128007808633 is a prime.

It is not a weakly prime, because it can be changed into another prime (128007808829) 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, 64003904444 + 64003904445.

It is an arithmetic number, because the mean of its divisors is an integer number (64003904445).

Almost surely, 2^128007808889 is an apocalyptic number.

It is an amenable number.

128007808889 is a deficient number, since it is larger than the sum of its proper divisors (1).

128007808889 is an equidigital number, since it uses as much as digits as its factorization.

128007808889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4128768, while the sum is 59.

The spelling of 128007808889 in words is "one hundred twenty-eight billion, seven million, eight hundred eight thousand, eight hundred eighty-nine".