205244902906 has 16 divisors (see below), whose sum is σ = 318015790344. Its totient is φ = 99271704384.

The previous prime is 205244902901. The next prime is 205244902927. The reversal of 205244902906 is 609209442502.

It can be written as a sum of positive squares in 4 ways, for example, as 200198079225 + 5046823681 = 447435^2 + 71041^2 .

It is not an unprimeable number, because it can be changed into a prime (205244902901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8003325 + ... + 8028928.

Almost surely, 2^205244902906 is an apocalyptic number.

205244902906 is a deficient number, since it is larger than the sum of its proper divisors (112770887438).

205244902906 is a wasteful number, since it uses less digits than its factorization.

205244902906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16032465.

The product of its (nonzero) digits is 311040, while the sum is 43.

The spelling of 205244902906 in words is "two hundred five billion, two hundred forty-four million, nine hundred two thousand, nine hundred six".