128255666602 has 16 divisors (see below), whose sum is σ = 219881214720. Its totient is φ = 54963124848.

The previous prime is 128255666533. The next prime is 128255666719. The reversal of 128255666602 is 206666552821.

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 7 ways as a sum of consecutive naturals, for example, 71077 + ... + 511432.

It is an arithmetic number, because the mean of its divisors is an integer number (13742575920).

Almost surely, 2^128255666602 is an apocalyptic number.

128255666602 is a deficient number, since it is larger than the sum of its proper divisors (91625548118).

128255666602 is a wasteful number, since it uses less digits than its factorization.

128255666602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 598245.

The product of its (nonzero) digits is 2073600, while the sum is 49.

The spelling of 128255666602 in words is "one hundred twenty-eight billion, two hundred fifty-five million, six hundred sixty-six thousand, six hundred two".