16556888656 has 40 divisors (see below), whose sum is σ = 39994565184. Its totient is φ = 6450735360.

The previous prime is 16556888627. The next prime is 16556888657. The reversal of 16556888656 is 65688865561.

16556888656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16556888657) by changing a digit.

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, 6718285 + ... + 6720748.

Almost surely, 2^16556888656 is an apocalyptic number.

16556888656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16556888656 is an abundant number, since it is smaller than the sum of its proper divisors (23437676528).

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

16556888656 is a wasteful number, since it uses less digits than its factorization.

16556888656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13439059 (or 13439053 counting only the distinct ones).

The product of its digits is 82944000, while the sum is 64.

The spelling of 16556888656 in words is "sixteen billion, five hundred fifty-six million, eight hundred eighty-eight thousand, six hundred fifty-six".