128404964816528 has 40 divisors (see below), whose sum is σ = 249044251451328. Its totient is φ = 64135507010432.

The previous prime is 128404964816413. The next prime is 128404964816599. The reversal of 128404964816528 is 825618469404821.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77121125 + ... + 78768507.

Almost surely, 2^{128404964816528} is an apocalyptic number.

It is an amenable number.

128404964816528 is a deficient number, since it is larger than the sum of its proper divisors (120639286634800).

128404964816528 is a wasteful number, since it uses less digits than its factorization.

128404964816528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1652471 (or 1652465 counting only the distinct ones).

The product of its (nonzero) digits is 212336640, while the sum is 68.

The spelling of 128404964816528 in words is "one hundred twenty-eight trillion, four hundred four billion, nine hundred sixty-four million, eight hundred sixteen thousand, five hundred twenty-eight".