205664412 has 12 divisors (see below), whose sum is σ = 479883656. Its totient is φ = 68554800.

The previous prime is 205664411. The next prime is 205664513. The reversal of 205664412 is 214466502.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 205664412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205664411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8569339 + ... + 8569362.

Almost surely, 2^205664412 is an apocalyptic number.

It is an amenable number.

205664412 is an abundant number, since it is smaller than the sum of its proper divisors (274219244).

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

205664412 is a wasteful number, since it uses less digits than its factorization.

205664412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17138708 (or 17138706 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 205664412 is about 14341.0045673237. The cubic root of 205664412 is about 590.2731781012.

The spelling of 205664412 in words is "two hundred five million, six hundred sixty-four thousand, four hundred twelve".