204520655265163 has 4 divisors (see below), whose sum is σ = 204535905495208. Its totient is φ = 204505405035120.

The previous prime is 204520655265161. The next prime is 204520655265229. The reversal of 204520655265163 is 361562556025402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 204520655265163 - 2¹ = 204520655265161 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 204520655265163.

It is not an unprimeable number, because it can be changed into a prime (204520655265161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7625094906 + ... + 7625121727.

It is an arithmetic number, because the mean of its divisors is an integer number (51133976373802).

Almost surely, 2^{204520655265163} is an apocalyptic number.

204520655265163 is a deficient number, since it is larger than the sum of its proper divisors (15250230045).

204520655265163 is a wasteful number, since it uses less digits than its factorization.

204520655265163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15250230044.

The product of its (nonzero) digits is 12960000, while the sum is 52.

The spelling of 204520655265163 in words is "two hundred four trillion, five hundred twenty billion, six hundred fifty-five million, two hundred sixty-five thousand, one hundred sixty-three".