206471761061 has 2 divisors, whose sum is σ = 206471761062. Its totient is φ = 206471761060.

The previous prime is 206471761043. The next prime is 206471761073. The reversal of 206471761061 is 160167174602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 171139416100 + 35332344961 = 413690^2 + 187969^2 .

It is a cyclic number.

It is not a de Polignac number, because 206471761061 - 2²² = 206467566757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206471761031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103235880530 + 103235880531.

It is an arithmetic number, because the mean of its divisors is an integer number (103235880531).

Almost surely, 2^206471761061 is an apocalyptic number.

It is an amenable number.

206471761061 is a deficient number, since it is larger than the sum of its proper divisors (1).

206471761061 is an equidigital number, since it uses as much as digits as its factorization.

206471761061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84672, while the sum is 41.

The spelling of 206471761061 in words is "two hundred six billion, four hundred seventy-one million, seven hundred sixty-one thousand, sixty-one".