205805164934 has 16 divisors (see below), whose sum is σ = 325252895280. Its totient is φ = 97397445600.

The previous prime is 205805164931. The next prime is 205805164951. The reversal of 205805164934 is 439461508502.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205805164931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2436017 + ... + 2519084.

It is an arithmetic number, because the mean of its divisors is an integer number (20328305955).

Almost surely, 2^205805164934 is an apocalyptic number.

205805164934 is a deficient number, since it is larger than the sum of its proper divisors (119447730346).

205805164934 is a wasteful number, since it uses less digits than its factorization.

205805164934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4956215.

The product of its (nonzero) digits is 1036800, while the sum is 47.

The spelling of 205805164934 in words is "two hundred five billion, eight hundred five million, one hundred sixty-four thousand, nine hundred thirty-four".