205606601065 has 32 divisors (see below), whose sum is σ = 262193003136. Its totient is φ = 154246794240.

The previous prime is 205606601063. The next prime is 205606601071. The reversal of 205606601065 is 560106606502.

It is not a de Polignac number, because 205606601065 - 2¹ = 205606601063 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205606601063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28501399 + ... + 28508611.

It is an arithmetic number, because the mean of its divisors is an integer number (8193531348).

Almost surely, 2^205606601065 is an apocalyptic number.

It is an amenable number.

205606601065 is a deficient number, since it is larger than the sum of its proper divisors (56586402071).

205606601065 is a wasteful number, since it uses less digits than its factorization.

205606601065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8409.

The product of its (nonzero) digits is 64800, while the sum is 37.

The spelling of 205606601065 in words is "two hundred five billion, six hundred six million, six hundred one thousand, sixty-five".