206615566141 has 2 divisors, whose sum is σ = 206615566142. Its totient is φ = 206615566140.

The previous prime is 206615566123. The next prime is 206615566211. The reversal of 206615566141 is 141665516602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 166603565241 + 40012000900 = 408171^2 + 200030^2 .

It is a cyclic number.

It is not a de Polignac number, because 206615566141 - 2¹¹ = 206615564093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206615566111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103307783070 + 103307783071.

It is an arithmetic number, because the mean of its divisors is an integer number (103307783071).

Almost surely, 2^206615566141 is an apocalyptic number.

It is an amenable number.

206615566141 is a deficient number, since it is larger than the sum of its proper divisors (1).

206615566141 is an equidigital number, since it uses as much as digits as its factorization.

206615566141 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 259200, while the sum is 43.

The spelling of 206615566141 in words is "two hundred six billion, six hundred fifteen million, five hundred sixty-six thousand, one hundred forty-one".