128704665069 has 64 divisors (see below), whose sum is σ = 200104312320. Its totient is φ = 81603624960.

The previous prime is 128704665053. The next prime is 128704665073. The reversal of 128704665069 is 960566407821.

128704665069 is a `hidden beast` number, since 1 + 2 + 8 + 70 + 4 + 66 + 506 + 9 = 666.

It is not a de Polignac number, because 128704665069 - 2⁴ = 128704665053 is a prime.

It is a super-2 number, since 2×128704665069² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128704665469) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 124592577 + ... + 124593609.

It is an arithmetic number, because the mean of its divisors is an integer number (3126629880).

Almost surely, 2^128704665069 is an apocalyptic number.

It is an amenable number.

128704665069 is a deficient number, since it is larger than the sum of its proper divisors (71399647251).

128704665069 is a wasteful number, since it uses less digits than its factorization.

128704665069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2019 (or 2013 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 54.

The spelling of 128704665069 in words is "one hundred twenty-eight billion, seven hundred four million, six hundred sixty-five thousand, sixty-nine".