128564572168 has 32 divisors (see below), whose sum is σ = 242511793560. Its totient is φ = 63894945280.

The previous prime is 128564572141. The next prime is 128564572177. The reversal of 128564572168 is 861275465821.

It can be written as a sum of positive squares in 4 ways, for example, as 121230705124 + 7333867044 = 348182^2 + 85638^2 .

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, 7272396 + ... + 7290052.

Almost surely, 2^128564572168 is an apocalyptic number.

It is an amenable number.

128564572168 is a deficient number, since it is larger than the sum of its proper divisors (113947221392).

128564572168 is a wasteful number, since it uses less digits than its factorization.

128564572168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23097 (or 23093 counting only the distinct ones).

The product of its digits is 6451200, while the sum is 55.

The spelling of 128564572168 in words is "one hundred twenty-eight billion, five hundred sixty-four million, five hundred seventy-two thousand, one hundred sixty-eight".