204310660161 has 16 divisors (see below), whose sum is σ = 273187028160. Its totient is φ = 135820843200.

The previous prime is 204310660157. The next prime is 204310660171. The reversal of 204310660161 is 161066013402.

It is not a de Polignac number, because 204310660161 - 2² = 204310660157 is a prime.

It is a super-3 number, since 3×204310660161³ (a number of 35 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (204310660111) 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, 6922111 + ... + 6951563.

It is an arithmetic number, because the mean of its divisors is an integer number (17074189260).

Almost surely, 2^204310660161 is an apocalyptic number.

It is an amenable number.

204310660161 is a deficient number, since it is larger than the sum of its proper divisors (68876367999).

204310660161 is a wasteful number, since it uses less digits than its factorization.

204310660161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35936.

The product of its (nonzero) digits is 5184, while the sum is 30.

Adding to 204310660161 its reverse (161066013402), we get a palindrome (365376673563).

The spelling of 204310660161 in words is "two hundred four billion, three hundred ten million, six hundred sixty thousand, one hundred sixty-one".