16855205684 has 6 divisors (see below), whose sum is σ = 29496609954. Its totient is φ = 8427602840.

The previous prime is 16855205683. The next prime is 16855205693. The reversal of 16855205684 is 48650255861.

16855205684 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 only one way, i.e., 13729277584 + 3125928100 = 117172^2 + 55910^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16855205683) 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 as a sum of consecutive naturals, namely, 2106900707 + ... + 2106900714.

It is an arithmetic number, because the mean of its divisors is an integer number (4916101659).

Almost surely, 2^16855205684 is an apocalyptic number.

It is an amenable number.

16855205684 is a deficient number, since it is larger than the sum of its proper divisors (12641404270).

16855205684 is a wasteful number, since it uses less digits than its factorization.

16855205684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4213801425 (or 4213801423 counting only the distinct ones).

The product of its (nonzero) digits is 2304000, while the sum is 50.

The spelling of 16855205684 in words is "sixteen billion, eight hundred fifty-five million, two hundred five thousand, six hundred eighty-four".