204711568128 has 54 divisors (see below), whose sum is σ = 590233924644. Its totient is φ = 68237188608.

The previous prime is 204711568111. The next prime is 204711568181. The reversal of 204711568128 is 821865117402.

204711568128 is a `hidden beast` number, since 2 + 0 + 4 + 71 + 1 + 568 + 12 + 8 = 666.

It is a super-2 number, since 2×204711568128² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 44422950 + ... + 44427557.

Almost surely, 2^204711568128 is an apocalyptic number.

It is an amenable number.

204711568128 is an abundant number, since it is smaller than the sum of its proper divisors (385522356516).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

204711568128 is an equidigital number, since it uses as much as digits as its factorization.

204711568128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88850529 (or 88850512 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 45.

The spelling of 204711568128 in words is "two hundred four billion, seven hundred eleven million, five hundred sixty-eight thousand, one hundred twenty-eight".