206641045 has 16 divisors (see below), whose sum is σ = 268758000. Its totient is φ = 151617024.

The previous prime is 206641013. The next prime is 206641049. The reversal of 206641045 is 540146602.

It can be written as a sum of positive squares in 8 ways, for example, as 43797924 + 162843121 = 6618^2 + 12761^2 .

It is not a de Polignac number, because 206641045 - 2⁵ = 206641013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206641049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81 + ... + 20329.

It is an arithmetic number, because the mean of its divisors is an integer number (16797375).

Almost surely, 2^206641045 is an apocalyptic number.

It is an amenable number.

206641045 is a deficient number, since it is larger than the sum of its proper divisors (62116955).

206641045 is a wasteful number, since it uses less digits than its factorization.

206641045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20424.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 206641045 is about 14375.0146086882. The cubic root of 206641045 is about 591.2060410980.

Adding to 206641045 its reverse (540146602), we get a palindrome (746787647).

The spelling of 206641045 in words is "two hundred six million, six hundred forty-one thousand, forty-five".