205641606 has 16 divisors (see below), whose sum is σ = 413051184. Its totient is φ = 68252544.

The previous prime is 205641593. The next prime is 205641613. The reversal of 205641606 is 606146502.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72151 + ... + 74946.

It is an arithmetic number, because the mean of its divisors is an integer number (25815699).

Almost surely, 2^205641606 is an apocalyptic number.

205641606 is an abundant number, since it is smaller than the sum of its proper divisors (207409578).

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

205641606 is a wasteful number, since it uses less digits than its factorization.

205641606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147335.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 205641606 is about 14340.2094126969. The cubic root of 205641606 is about 590.2513589516.

The spelling of 205641606 in words is "two hundred five million, six hundred forty-one thousand, six hundred six".