204961685844 has 48 divisors (see below), whose sum is σ = 479744778240. Its totient is φ = 68106292320.

The previous prime is 204961685833. The next prime is 204961685867. The reversal of 204961685844 is 448586169402.

204961685844 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 15635797 + ... + 15648899.

It is an arithmetic number, because the mean of its divisors is an integer number (9994682880).

Almost surely, 2^204961685844 is an apocalyptic number.

It is an amenable number.

204961685844 is an abundant number, since it is smaller than the sum of its proper divisors (274783092396).

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

204961685844 is a wasteful number, since it uses less digits than its factorization.

204961685844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17100 (or 17098 counting only the distinct ones).

The product of its (nonzero) digits is 13271040, while the sum is 57.

The spelling of 204961685844 in words is "two hundred four billion, nine hundred sixty-one million, six hundred eighty-five thousand, eight hundred forty-four".