205450205445 has 12 divisors (see below), whose sum is σ = 356113689516. Its totient is φ = 109573442880.

The previous prime is 205450205407. The next prime is 205450205497. The reversal of 205450205445 is 544502054502.

205450205445 is a `hidden beast` number, since 2 + 0 + 5 + 4 + 5 + 0 + 205 + 445 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 142618767201 + 62831438244 = 377649^2 + 250662^2 .

It is not a de Polignac number, because 205450205445 - 2³² = 201155238149 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2282780016 + ... + 2282780105.

It is an arithmetic number, because the mean of its divisors is an integer number (29676140793).

Almost surely, 2^205450205445 is an apocalyptic number.

It is an amenable number.

205450205445 is a deficient number, since it is larger than the sum of its proper divisors (150663484071).

205450205445 is a wasteful number, since it uses less digits than its factorization.

205450205445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4565560132 (or 4565560129 counting only the distinct ones).

The product of its (nonzero) digits is 160000, while the sum is 36.

Adding to 205450205445 its reverse (544502054502), we get a palindrome (749952259947).

The spelling of 205450205445 in words is "two hundred five billion, four hundred fifty million, two hundred five thousand, four hundred forty-five".