205406166244 has 6 divisors (see below), whose sum is σ = 359460790934. Its totient is φ = 102703083120.

The previous prime is 205406166239. The next prime is 205406166281. The reversal of 205406166244 is 442661604502.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 147695713344 + 57710452900 = 384312^2 + 240230^2 .

It is a junction number, because it is equal to n+sod(n) for n = 205406166197 and 205406166206.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25675770777 + ... + 25675770784.

Almost surely, 2^205406166244 is an apocalyptic number.

It is an amenable number.

205406166244 is a deficient number, since it is larger than the sum of its proper divisors (154054624690).

205406166244 is a wasteful number, since it uses less digits than its factorization.

205406166244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51351541565 (or 51351541563 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 40.

The spelling of 205406166244 in words is "two hundred five billion, four hundred six million, one hundred sixty-six thousand, two hundred forty-four".