128616419656 has 32 divisors (see below), whose sum is σ = 245148651000. Its totient is φ = 63243786240.

The previous prime is 128616419629. The next prime is 128616419663. The reversal of 128616419656 is 656914616821.

It can be written as a sum of positive squares in 4 ways, for example, as 96928859556 + 31687560100 = 311334^2 + 178010^2 .

It is a junction number, because it is equal to n+sod(n) for n = 128616419597 and 128616419606.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3666456 + ... + 3701368.

Almost surely, 2^128616419656 is an apocalyptic number.

It is an amenable number.

128616419656 is a deficient number, since it is larger than the sum of its proper divisors (116532231344).

128616419656 is a wasteful number, since it uses less digits than its factorization.

128616419656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42529 (or 42525 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 55.

The spelling of 128616419656 in words is "one hundred twenty-eight billion, six hundred sixteen million, four hundred nineteen thousand, six hundred fifty-six".