204015566204406 has 96 divisors (see below), whose sum is σ = 488833038439200. Its totient is φ = 60974925465600.

The previous prime is 204015566204393. The next prime is 204015566204441. The reversal of 204015566204406 is 604402665510402.

204015566204406 is a `hidden beast` number, since 2 + 0 + 4 + 0 + 15 + 5 + 6 + 620 + 4 + 4 + 0 + 6 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1229215266 + ... + 1229381226.

It is an arithmetic number, because the mean of its divisors is an integer number (5092010817075).

Almost surely, 2^{204015566204406} is an apocalyptic number.

204015566204406 is an abundant number, since it is smaller than the sum of its proper divisors (284817472234794).

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

204015566204406 is a wasteful number, since it uses less digits than its factorization.

204015566204406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251102 (or 251099 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 45.

The spelling of 204015566204406 in words is "two hundred four trillion, fifteen billion, five hundred sixty-six million, two hundred four thousand, four hundred six".