205385205388 has 48 divisors (see below), whose sum is σ = 413141783040. Its totient is φ = 88356398400.

The previous prime is 205385205379. The next prime is 205385205451. The reversal of 205385205388 is 883502583502.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 733245 + ... + 973867.

It is an arithmetic number, because the mean of its divisors is an integer number (8607120480).

Almost surely, 2^205385205388 is an apocalyptic number.

It is an amenable number.

205385205388 is an abundant number, since it is smaller than the sum of its proper divisors (207756577652).

205385205388 is a wasteful number, since it uses less digits than its factorization.

205385205388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241678 (or 241676 counting only the distinct ones).

The product of its (nonzero) digits is 2304000, while the sum is 49.

The spelling of 205385205388 in words is "two hundred five billion, three hundred eighty-five million, two hundred five thousand, three hundred eighty-eight".