204205163311 has 4 divisors (see below), whose sum is σ = 204541580992. Its totient is φ = 203868745632.

The previous prime is 204205163233. The next prime is 204205163329. The reversal of 204205163311 is 113361502402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204205163311 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 204205163311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204205863311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168207930 + ... + 168209143.

It is an arithmetic number, because the mean of its divisors is an integer number (51135395248).

Almost surely, 2^204205163311 is an apocalyptic number.

204205163311 is a deficient number, since it is larger than the sum of its proper divisors (336417681).

204205163311 is an equidigital number, since it uses as much as digits as its factorization.

204205163311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336417680.

The product of its (nonzero) digits is 4320, while the sum is 28.

Adding to 204205163311 its reverse (113361502402), we get a palindrome (317566665713).

The spelling of 204205163311 in words is "two hundred four billion, two hundred five million, one hundred sixty-three thousand, three hundred eleven".