204559558816 has 48 divisors (see below), whose sum is σ = 408473936640. Its totient is φ = 100824272640.

The previous prime is 204559558793. The next prime is 204559558817. The reversal of 204559558816 is 618855955402.

It is a super-2 number, since 2×204559558816² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (204559558817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1531050 + ... + 1659286.

It is an arithmetic number, because the mean of its divisors is an integer number (8509873680).

Almost surely, 2^204559558816 is an apocalyptic number.

It is an amenable number.

204559558816 is a deficient number, since it is larger than the sum of its proper divisors (203914377824).

204559558816 is a wasteful number, since it uses less digits than its factorization.

204559558816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128957 (or 128949 counting only the distinct ones).

The product of its (nonzero) digits is 17280000, while the sum is 58.

The spelling of 204559558816 in words is "two hundred four billion, five hundred fifty-nine million, five hundred fifty-eight thousand, eight hundred sixteen".