204847665201 has 21 divisors (see below), whose sum is σ = 307149321769. Its totient is φ = 136556963316.

The previous prime is 204847665173. The next prime is 204847665247. The reversal of 204847665201 is 102566748402.

The square root of 204847665201 is 452601.

It is a perfect power (a square), and thus also a powerful number.

204847665201 is a `hidden beast` number, since 20 + 4 + 8 + 47 + 66 + 520 + 1 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-204847665201 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (204847663201) by changing a digit.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 12211846 + ... + 12228608.

Almost surely, 2^204847665201 is an apocalyptic number.

204847665201 is the 452601-st square number.

204847665201 is the 226301-st centered octagonal number.

It is an amenable number.

204847665201 is a deficient number, since it is larger than the sum of its proper divisors (102301656568).

204847665201 is an frugal number, since it uses more digits than its factorization.

204847665201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33544 (or 16766 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The spelling of 204847665201 in words is "two hundred four billion, eight hundred forty-seven million, six hundred sixty-five thousand, two hundred one".