206542630061 has 2 divisors, whose sum is σ = 206542630062. Its totient is φ = 206542630060.

The previous prime is 206542630039. The next prime is 206542630067. The reversal of 206542630061 is 160036245602.

It is a happy number.

206542630061 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 178362628900 + 28180001161 = 422330^2 + 167869^2 .

It is a cyclic number.

It is not a de Polignac number, because 206542630061 - 2¹⁴ = 206542613677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206542630067) by changing a digit.

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 as a sum of consecutive naturals, namely, 103271315030 + 103271315031.

It is an arithmetic number, because the mean of its divisors is an integer number (103271315031).

Almost surely, 2^206542630061 is an apocalyptic number.

It is an amenable number.

206542630061 is a deficient number, since it is larger than the sum of its proper divisors (1).

206542630061 is an equidigital number, since it uses as much as digits as its factorization.

206542630061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 35.

Adding to 206542630061 its reverse (160036245602), we get a palindrome (366578875663).

The spelling of 206542630061 in words is "two hundred six billion, five hundred forty-two million, six hundred thirty thousand, sixty-one".