206240060261 has 2 divisors, whose sum is σ = 206240060262. Its totient is φ = 206240060260.

The previous prime is 206240060161. The next prime is 206240060269. The reversal of 206240060261 is 162060042602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112564276036 + 93675784225 = 335506^2 + 306065^2 .

It is a cyclic number.

It is not a de Polignac number, because 206240060261 - 2¹⁰ = 206240059237 is a prime.

It is a super-2 number, since 2×206240060261² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206240060269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103120030130 + 103120030131.

It is an arithmetic number, because the mean of its divisors is an integer number (103120030131).

Almost surely, 2^206240060261 is an apocalyptic number.

It is an amenable number.

206240060261 is a deficient number, since it is larger than the sum of its proper divisors (1).

206240060261 is an equidigital number, since it uses as much as digits as its factorization.

206240060261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 29.

The spelling of 206240060261 in words is "two hundred six billion, two hundred forty million, sixty thousand, two hundred sixty-one".