16856684976 has 40 divisors (see below), whose sum is σ = 43563783664. Its totient is φ = 5616656640.

The previous prime is 16856684921. The next prime is 16856684987. The reversal of 16856684976 is 67948665861.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54066 + ... + 191406.

Almost surely, 2^16856684976 is an apocalyptic number.

16856684976 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16856684976 is an abundant number, since it is smaller than the sum of its proper divisors (26707098688).

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

16856684976 is a wasteful number, since it uses less digits than its factorization.

16856684976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139909 (or 139903 counting only the distinct ones).

The product of its digits is 104509440, while the sum is 66.

The spelling of 16856684976 in words is "sixteen billion, eight hundred fifty-six million, six hundred eighty-four thousand, nine hundred seventy-six".