204872887305 has 80 divisors (see below), whose sum is σ = 369765059664. Its totient is φ = 108519989760.

The previous prime is 204872887301. The next prime is 204872887333. The reversal of 204872887305 is 503788278402.

It can be written as a sum of positive squares in 8 ways, for example, as 2672476416 + 202200410889 = 51696^2 + 449667^2 .

It is not a de Polignac number, because 204872887305 - 2² = 204872887301 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (204872887301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 80121087 + ... + 80123643.

Almost surely, 2^204872887305 is an apocalyptic number.

It is an amenable number.

204872887305 is a deficient number, since it is larger than the sum of its proper divisors (164892172359).

204872887305 is a wasteful number, since it uses less digits than its factorization.

204872887305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3848 (or 3839 counting only the distinct ones).

The product of its (nonzero) digits is 6021120, while the sum is 54.

The spelling of 204872887305 in words is "two hundred four billion, eight hundred seventy-two million, eight hundred eighty-seven thousand, three hundred five".