205063137808 has 40 divisors (see below), whose sum is σ = 398961072000. Its totient is φ = 102106228224.

The previous prime is 205063137793. The next prime is 205063137833. The reversal of 205063137808 is 808731360502.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4243768 + ... + 4291816.

It is an arithmetic number, because the mean of its divisors is an integer number (9974026800).

Almost surely, 2^205063137808 is an apocalyptic number.

It is an amenable number.

205063137808 is a deficient number, since it is larger than the sum of its proper divisors (193897934192).

205063137808 is a wasteful number, since it uses less digits than its factorization.

205063137808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49159 (or 49153 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 43.

The spelling of 205063137808 in words is "two hundred five billion, sixty-three million, one hundred thirty-seven thousand, eight hundred eight".