205354553105 has 8 divisors (see below), whose sum is σ = 265381268712. Its totient is φ = 151646439168.

The previous prime is 205354553039. The next prime is 205354553167. The reversal of 205354553105 is 501355453502.

205354553105 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 7278819856 + 198075733249 = 85316^2 + 445057^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 205354553105 - 2¹⁴ = 205354536721 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1579650344 + ... + 1579650473.

It is an arithmetic number, because the mean of its divisors is an integer number (33172658589).

Almost surely, 2^205354553105 is an apocalyptic number.

It is an amenable number.

205354553105 is a deficient number, since it is larger than the sum of its proper divisors (60026715607).

205354553105 is a wasteful number, since it uses less digits than its factorization.

205354553105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3159300835.

The product of its (nonzero) digits is 225000, while the sum is 38.

The spelling of 205354553105 in words is "two hundred five billion, three hundred fifty-four million, five hundred fifty-three thousand, one hundred five".