128701617565 has 16 divisors (see below), whose sum is σ = 156266035200. Its totient is φ = 101750167872.

The previous prime is 128701617559. The next prime is 128701617601. The reversal of 128701617565 is 565716107821.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 128701617565 - 2³ = 128701617557 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99555 + ... + 517024.

It is an arithmetic number, because the mean of its divisors is an integer number (9766627200).

Almost surely, 2^128701617565 is an apocalyptic number.

It is an amenable number.

128701617565 is a deficient number, since it is larger than the sum of its proper divisors (27564417635).

128701617565 is a wasteful number, since it uses less digits than its factorization.

128701617565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617076.

The product of its (nonzero) digits is 705600, while the sum is 49.

The spelling of 128701617565 in words is "one hundred twenty-eight billion, seven hundred one million, six hundred seventeen thousand, five hundred sixty-five".