16812656688 has 80 divisors (see below), whose sum is σ = 44667180800. Its totient is φ = 5446248192.

The previous prime is 16812656687. The next prime is 16812656717. The reversal of 16812656688 is 88665621861.

It is a happy number.

It is a super-2 number, since 2×16812656688² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16812656687) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 390270 + ... + 431202.

It is an arithmetic number, because the mean of its divisors is an integer number (558339760).

Almost surely, 2^16812656688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16812656688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22333590400).

16812656688 is an abundant number, since it is smaller than the sum of its proper divisors (27854524112).

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

16812656688 is a wasteful number, since it uses less digits than its factorization.

16812656688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41186 (or 41180 counting only the distinct ones).

The product of its digits is 6635520, while the sum is 57.

The spelling of 16812656688 in words is "sixteen billion, eight hundred twelve million, six hundred fifty-six thousand, six hundred eighty-eight".