205004550045 has 32 divisors (see below), whose sum is σ = 329746636800. Its totient is φ = 108756777024.

The previous prime is 205004550019. The next prime is 205004550067. The reversal of 205004550045 is 540055400502.

It is not a de Polignac number, because 205004550045 - 2¹³ = 205004541853 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 205004549994 and 205004550021.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4187016 + ... + 4235694.

It is an arithmetic number, because the mean of its divisors is an integer number (10304582400).

Almost surely, 2^205004550045 is an apocalyptic number.

It is an amenable number.

205004550045 is a deficient number, since it is larger than the sum of its proper divisors (124742086755).

205004550045 is a wasteful number, since it uses less digits than its factorization.

205004550045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50169.

The product of its (nonzero) digits is 20000, while the sum is 30.

Adding to 205004550045 its reverse (540055400502), we get a palindrome (745059950547).

The spelling of 205004550045 in words is "two hundred five billion, four million, five hundred fifty thousand, forty-five".