128789087766784 has 27 divisors (see below), whose sum is σ = 257075455603603. Its totient is φ = 64394453095168.

The previous prime is 128789087766769. The next prime is 128789087766853. The reversal of 128789087766784 is 487667780987821.

The square root of 128789087766784 is 11348528.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128789087766695 and 128789087766704.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 181221807 + ... + 181931089.

Almost surely, 2^{128789087766784} is an apocalyptic number.

128789087766784 is the 11348528-th square number.

It is an amenable number.

128789087766784 is a deficient number, since it is larger than the sum of its proper divisors (128286367836819).

128789087766784 is an frugal number, since it uses more digits than its factorization.

128789087766784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1418582 (or 709285 counting only the distinct ones).

The product of its (nonzero) digits is 25491013632, while the sum is 88.

The spelling of 128789087766784 in words is "one hundred twenty-eight trillion, seven hundred eighty-nine billion, eighty-seven million, seven hundred sixty-six thousand, seven hundred eighty-four".