205555568 has 20 divisors (see below), whose sum is σ = 421691760. Its totient is φ = 96731904.

The previous prime is 205555561. The next prime is 205555573. The reversal of 205555568 is 865555502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205555561) 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, 377588 + ... + 378131.

It is an arithmetic number, because the mean of its divisors is an integer number (21084588).

Almost surely, 2^205555568 is an apocalyptic number.

It is an amenable number.

205555568 is an abundant number, since it is smaller than the sum of its proper divisors (216136192).

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

205555568 is a wasteful number, since it uses less digits than its factorization.

205555568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755744 (or 755738 counting only the distinct ones).

The product of its (nonzero) digits is 300000, while the sum is 41.

The square root of 205555568 is about 14337.2092123956. The cubic root of 205555568 is about 590.1690294212.

The spelling of 205555568 in words is "two hundred five million, five hundred fifty-five thousand, five hundred sixty-eight".