16689964868 has 12 divisors (see below), whose sum is σ = 29213346540. Its totient is φ = 8343294432.

The previous prime is 16689964867. The next prime is 16689964883. The reversal of 16689964868 is 86846998661.

16689964868 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 2 ways, for example, as 8656069444 + 8033895424 = 93038^2 + 89632^2 .

It is not an unprimeable number, because it can be changed into a prime (16689964861) 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 3 ways as a sum of consecutive naturals, for example, 399623 + ... + 439406.

It is an arithmetic number, because the mean of its divisors is an integer number (2434445545).

Almost surely, 2^16689964868 is an apocalyptic number.

It is an amenable number.

16689964868 is a deficient number, since it is larger than the sum of its proper divisors (12523381672).

16689964868 is a wasteful number, since it uses less digits than its factorization.

16689964868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844006 (or 844004 counting only the distinct ones).

The product of its digits is 214990848, while the sum is 71.

The spelling of 16689964868 in words is "sixteen billion, six hundred eighty-nine million, nine hundred sixty-four thousand, eight hundred sixty-eight".