206261098174849 has 3 divisors (see below), whose sum is σ = 206261112536643. Its totient is φ = 206261083813056.

The previous prime is 206261098174751. The next prime is 206261098174907. The reversal of 206261098174849 is 948471890162602.

The square root of 206261098174849 is 14361793.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 75049388241025 + 131211709933824 = 8663105^2 + 11454768^2 .

It is not a de Polignac number, because 206261098174849 - 2²¹ = 206261096077697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206261078174849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 7180897 + ... + 21542689.

It is an arithmetic number, because the mean of its divisors is an integer number (68753704178881).

Almost surely, 2^{206261098174849} is an apocalyptic number.

206261098174849 is the 14361793-rd square number.

206261098174849 is the 7180897-th centered octagonal number.

It is an amenable number.

206261098174849 is a deficient number, since it is larger than the sum of its proper divisors (14361794).

206261098174849 is an frugal number, since it uses more digits than its factorization.

206261098174849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28723586 (or 14361793 counting only the distinct ones).

The product of its (nonzero) digits is 83607552, while the sum is 67.

The spelling of 206261098174849 in words is "two hundred six trillion, two hundred sixty-one billion, ninety-eight million, one hundred seventy-four thousand, eight hundred forty-nine".