128844193656 has 32 divisors (see below), whose sum is σ = 327390987600. Its totient is φ = 42243997440.

The previous prime is 128844193633. The next prime is 128844193657. The reversal of 128844193656 is 656391448821.

It is a junction number, because it is equal to n+sod(n) for n = 128844193596 and 128844193605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128844193657) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44002701 + ... + 44005628.

Almost surely, 2^128844193656 is an apocalyptic number.

It is an amenable number.

128844193656 is an abundant number, since it is smaller than the sum of its proper divisors (198546793944).

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

128844193656 is a wasteful number, since it uses less digits than its factorization.

128844193656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88008399 (or 88008395 counting only the distinct ones).

The product of its digits is 9953280, while the sum is 57.

The spelling of 128844193656 in words is "one hundred twenty-eight billion, eight hundred forty-four million, one hundred ninety-three thousand, six hundred fifty-six".