204908561872 has 80 divisors (see below), whose sum is σ = 488291818752. Its totient is φ = 81297192960.

The previous prime is 204908561863. The next prime is 204908561881. The reversal of 204908561872 is 278165809402.

It is an interprime number because it is at equal distance from previous prime (204908561863) and next prime (204908561881).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 765988 + ... + 998275.

Almost surely, 2^204908561872 is an apocalyptic number.

It is an amenable number.

204908561872 is an abundant number, since it is smaller than the sum of its proper divisors (283383256880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

204908561872 is a wasteful number, since it uses less digits than its factorization.

204908561872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1764356 (or 1764350 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 52.

The spelling of 204908561872 in words is "two hundred four billion, nine hundred eight million, five hundred sixty-one thousand, eight hundred seventy-two".