16681984850 has 12 divisors (see below), whose sum is σ = 31028491914. Its totient is φ = 6672793920.

The previous prime is 16681984849. The next prime is 16681984873. The reversal of 16681984850 is 5848918661.

16681984850 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 10062697969 + 6619286881 = 100313^2 + 81359^2 .

It is a hoax number, since the sum of its digits (56) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 166819799 + ... + 166819898.

Almost surely, 2^16681984850 is an apocalyptic number.

16681984850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16681984850 is a deficient number, since it is larger than the sum of its proper divisors (14346507064).

16681984850 is a wasteful number, since it uses less digits than its factorization.

16681984850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333639709 (or 333639704 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 56.

The spelling of 16681984850 in words is "sixteen billion, six hundred eighty-one million, nine hundred eighty-four thousand, eight hundred fifty".