204566004155 has 8 divisors (see below), whose sum is σ = 245483037072. Its totient is φ = 163650248608.

The previous prime is 204566004109. The next prime is 204566004161. The reversal of 204566004155 is 551400665402.

204566004155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 204566004155 - 2¹⁴ = 204565987771 is a prime.

It is a Duffinian 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, 77909 + ... + 644361.

It is an arithmetic number, because the mean of its divisors is an integer number (30685379634).

Almost surely, 2^204566004155 is an apocalyptic number.

204566004155 is a deficient number, since it is larger than the sum of its proper divisors (40917032917).

204566004155 is an equidigital number, since it uses as much as digits as its factorization.

204566004155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638685.

The product of its (nonzero) digits is 144000, while the sum is 38.

Adding to 204566004155 its reverse (551400665402), we get a palindrome (755966669557).

The spelling of 204566004155 in words is "two hundred four billion, five hundred sixty-six million, four thousand, one hundred fifty-five".