16684136656 has 40 divisors (see below), whose sum is σ = 35304463584. Its totient is φ = 7575039360.

The previous prime is 16684136629. The next prime is 16684136659. The reversal of 16684136656 is 65663148661.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16684136659) 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, 101730 + ... + 209086.

Almost surely, 2^16684136656 is an apocalyptic number.

16684136656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16684136656 is an abundant number, since it is smaller than the sum of its proper divisors (18620326928).

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

16684136656 is a wasteful number, since it uses less digits than its factorization.

16684136656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108259 (or 108253 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 52.

The spelling of 16684136656 in words is "sixteen billion, six hundred eighty-four million, one hundred thirty-six thousand, six hundred fifty-six".