204704786161 has 16 divisors (see below), whose sum is σ = 207714464640. Its totient is φ = 201716179200.

The previous prime is 204704786159. The next prime is 204704786171. The reversal of 204704786161 is 161687407402.

It is a cyclic number.

It is not a de Polignac number, because 204704786161 - 2¹ = 204704786159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204704786131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26263881 + ... + 26271673.

It is an arithmetic number, because the mean of its divisors is an integer number (12982154040).

Almost surely, 2^204704786161 is an apocalyptic number.

It is an amenable number.

204704786161 is a deficient number, since it is larger than the sum of its proper divisors (3009678479).

204704786161 is a wasteful number, since it uses less digits than its factorization.

204704786161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9096.

The product of its (nonzero) digits is 451584, while the sum is 46.

The spelling of 204704786161 in words is "two hundred four billion, seven hundred four million, seven hundred eighty-six thousand, one hundred sixty-one".