205385981258 has 16 divisors (see below), whose sum is σ = 310746908736. Its totient is φ = 101805275520.

The previous prime is 205385981221. The next prime is 205385981263. The reversal of 205385981258 is 852189583502.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141191 + ... + 656282.

It is an arithmetic number, because the mean of its divisors is an integer number (19421681796).

Almost surely, 2^205385981258 is an apocalyptic number.

205385981258 is a deficient number, since it is larger than the sum of its proper divisors (105360927478).

205385981258 is a wasteful number, since it uses less digits than its factorization.

205385981258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798589.

The product of its (nonzero) digits is 6912000, while the sum is 56.

The spelling of 205385981258 in words is "two hundred five billion, three hundred eighty-five million, nine hundred eighty-one thousand, two hundred fifty-eight".