204265550545 has 12 divisors (see below), whose sum is σ = 285138034164. Its totient is φ = 140067805920.

The previous prime is 204265550543. The next prime is 204265550561. The reversal of 204265550545 is 545055562402.

It can be written as a sum of positive squares in 2 ways, for example, as 25671409729 + 178594140816 = 160223^2 + 422604^2 .

It is not a de Polignac number, because 204265550545 - 2¹ = 204265550543 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204265550543) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 416868226 + ... + 416868715.

It is an arithmetic number, because the mean of its divisors is an integer number (23761502847).

Almost surely, 2^204265550545 is an apocalyptic number.

It is an amenable number.

204265550545 is a deficient number, since it is larger than the sum of its proper divisors (80872483619).

204265550545 is an equidigital number, since it uses as much as digits as its factorization.

204265550545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 833736960 (or 833736953 counting only the distinct ones).

The product of its (nonzero) digits is 1200000, while the sum is 43.

The spelling of 204265550545 in words is "two hundred four billion, two hundred sixty-five million, five hundred fifty thousand, five hundred forty-five".