16128684556 has 12 divisors (see below), whose sum is σ = 28582479520. Its totient is φ = 7962261840.

The previous prime is 16128684521. The next prime is 16128684563. The reversal of 16128684556 is 65548682161.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25519755 + ... + 25520386.

Almost surely, 2^16128684556 is an apocalyptic number.

It is an amenable number.

16128684556 is a deficient number, since it is larger than the sum of its proper divisors (12453794964).

16128684556 is a wasteful number, since it uses less digits than its factorization.

16128684556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51040224 (or 51040222 counting only the distinct ones).

The product of its digits is 2764800, while the sum is 52.

The spelling of 16128684556 in words is "sixteen billion, one hundred twenty-eight million, six hundred eighty-four thousand, five hundred fifty-six".