204505427563 has 4 divisors (see below), whose sum is σ = 204565350528. Its totient is φ = 204445504600.

The previous prime is 204505427531. The next prime is 204505427593. The reversal of 204505427563 is 365724505402.

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 204505427563 - 2⁵ = 204505427531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204505427593) 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, 29956363 + ... + 29963188.

It is an arithmetic number, because the mean of its divisors is an integer number (51141337632).

Almost surely, 2^204505427563 is an apocalyptic number.

204505427563 is a deficient number, since it is larger than the sum of its proper divisors (59922965).

204505427563 is an equidigital number, since it uses as much as digits as its factorization.

204505427563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59922964.

The product of its (nonzero) digits is 1008000, while the sum is 43.

The spelling of 204505427563 in words is "two hundred four billion, five hundred five million, four hundred twenty-seven thousand, five hundred sixty-three".