204121265140265 has 48 divisors (see below), whose sum is σ = 285086566581264. Its totient is φ = 139713770127360.

The previous prime is 204121265140181. The next prime is 204121265140313. The reversal of 204121265140265 is 562041562121402.

It can be written as a sum of positive squares in 8 ways, for example, as 7522139993104 + 196599125147161 = 2742652^2 + 14021381^2 .

It is not a de Polignac number, because 204121265140265 - 2⁴⁶ = 133752520962601 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 264896279 + ... + 265665731.

It is an arithmetic number, because the mean of its divisors is an integer number (5939303470443).

Almost surely, 2^{204121265140265} is an apocalyptic number.

It is an amenable number.

204121265140265 is a deficient number, since it is larger than the sum of its proper divisors (80965301440999).

204121265140265 is a wasteful number, since it uses less digits than its factorization.

204121265140265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 795290 (or 795279 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 41.

The spelling of 204121265140265 in words is "two hundred four trillion, one hundred twenty-one billion, two hundred sixty-five million, one hundred forty thousand, two hundred sixty-five".