204558417988 has 12 divisors (see below), whose sum is σ = 359794376172. Its totient is φ = 101760024800.

The previous prime is 204558417919. The next prime is 204558417991. The reversal of 204558417988 is 889714855402.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 191346754624 + 13211663364 = 437432^2 + 114942^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129795163 + ... + 129796738.

It is an arithmetic number, because the mean of its divisors is an integer number (29982864681).

Almost surely, 2^204558417988 is an apocalyptic number.

It is an amenable number.

204558417988 is a deficient number, since it is larger than the sum of its proper divisors (155235958184).

204558417988 is a wasteful number, since it uses less digits than its factorization.

204558417988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259592102 (or 259592100 counting only the distinct ones).

The product of its (nonzero) digits is 25804800, while the sum is 61.

The spelling of 204558417988 in words is "two hundred four billion, five hundred fifty-eight million, four hundred seventeen thousand, nine hundred eighty-eight".