206413045205 has 4 divisors (see below), whose sum is σ = 247695654252. Its totient is φ = 165130436160.

The previous prime is 206413045183. The next prime is 206413045273. The reversal of 206413045205 is 502540314602.

206413045205 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 502540314602 = 2 ⋅251270157301.

It can be written as a sum of positive squares in 2 ways, for example, as 147574295716 + 58838749489 = 384154^2 + 242567^2 .

It is not a de Polignac number, because 206413045205 - 2¹⁰ = 206413044181 is a prime.

It is a Duffinian number.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 20641304516 + ... + 20641304525.

It is an arithmetic number, because the mean of its divisors is an integer number (61923913563).

Almost surely, 2^206413045205 is an apocalyptic number.

It is an amenable number.

206413045205 is a deficient number, since it is larger than the sum of its proper divisors (41282609047).

206413045205 is an equidigital number, since it uses as much as digits as its factorization.

206413045205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41282609046.

The product of its (nonzero) digits is 28800, while the sum is 32.

Adding to 206413045205 its reverse (502540314602), we get a palindrome (708953359807).

The spelling of 206413045205 in words is "two hundred six billion, four hundred thirteen million, forty-five thousand, two hundred five".