205805453844 has 24 divisors (see below), whose sum is σ = 486976287168. Its totient is φ = 67635594880.

The previous prime is 205805453813. The next prime is 205805453891. The reversal of 205805453844 is 448354508502.

205805453844 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 205805453793 and 205805453802.

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 7 ways as a sum of consecutive naturals, for example, 120776997 + ... + 120778700.

It is an arithmetic number, because the mean of its divisors is an integer number (20290678632).

Almost surely, 2^205805453844 is an apocalyptic number.

It is an amenable number.

205805453844 is an abundant number, since it is smaller than the sum of its proper divisors (281170833324).

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

205805453844 is a wasteful number, since it uses less digits than its factorization.

205805453844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241555775 (or 241555773 counting only the distinct ones).

The product of its (nonzero) digits is 3072000, while the sum is 48.

The spelling of 205805453844 in words is "two hundred five billion, eight hundred five million, four hundred fifty-three thousand, eight hundred forty-four".