128744075664 has 60 divisors (see below), whose sum is σ = 364019120556. Its totient is φ = 42472267776.

The previous prime is 128744075641. The next prime is 128744075689. The reversal of 128744075664 is 466570447821.

128744075664 is a `hidden beast` number, since 1 + 2 + 8 + 74 + 4 + 0 + 7 + 566 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 72518181264 + 56225894400 = 269292^2 + 237120^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 128744075664.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4594569 + ... + 4622504.

Almost surely, 2^128744075664 is an apocalyptic number.

It is an amenable number.

128744075664 is an abundant number, since it is smaller than the sum of its proper divisors (235275044892).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128744075664 is a wasteful number, since it uses less digits than its factorization.

128744075664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9217184 (or 9217175 counting only the distinct ones).

The product of its (nonzero) digits is 9031680, while the sum is 54.

The spelling of 128744075664 in words is "one hundred twenty-eight billion, seven hundred forty-four million, seventy-five thousand, six hundred sixty-four".