206089668841 has 9 divisors (see below), whose sum is σ = 239740658391. Its totient is φ = 176645563752.

The previous prime is 206089668839. The next prime is 206089668881. The reversal of 206089668841 is 148866980602.

The square root of 206089668841 is 453971.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 160124024025 + 45965644816 = 400155^2 + 214396^2 .

It is not a de Polignac number, because 206089668841 - 2¹ = 206089668839 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206089668881) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3145371 + ... + 3210223.

Almost surely, 2^206089668841 is an apocalyptic number.

206089668841 is the 453971-st square number.

206089668841 is the 226986-th centered octagonal number.

It is an amenable number.

206089668841 is a deficient number, since it is larger than the sum of its proper divisors (33650989550).

206089668841 is an frugal number, since it uses more digits than its factorization.

206089668841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129720 (or 64860 counting only the distinct ones).

The product of its (nonzero) digits is 7962624, while the sum is 58.

The spelling of 206089668841 in words is "two hundred six billion, eighty-nine million, six hundred sixty-eight thousand, eight hundred forty-one".