205044485505 has 16 divisors (see below), whose sum is σ = 329347724544. Its totient is φ = 108931543040.

The previous prime is 205044485489. The next prime is 205044485509. The reversal of 205044485505 is 505584440502.

It is not a de Polignac number, because 205044485505 - 2⁴ = 205044485489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (205044485509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26590761 + ... + 26598470.

It is an arithmetic number, because the mean of its divisors is an integer number (20584232784).

Almost surely, 2^205044485505 is an apocalyptic number.

It is an amenable number.

205044485505 is a deficient number, since it is larger than the sum of its proper divisors (124303239039).

205044485505 is a wasteful number, since it uses less digits than its factorization.

205044485505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53189496.

The product of its (nonzero) digits is 640000, while the sum is 42.

The spelling of 205044485505 in words is "two hundred five billion, forty-four million, four hundred eighty-five thousand, five hundred five".