2680433663209 has 9 divisors (see below), whose sum is σ = 2769740922519. Its totient is φ = 2593918945080.

The previous prime is 2680433663197. The next prime is 2680433663249. The reversal of 2680433663209 is 9023663340862.

The square root of 2680433663209 is 1637203.

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

2680433663209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 101505625 + 2680332157584 = 10075^2 + 1637172^2 .

It is not a de Polignac number, because 2680433663209 - 2²³ = 2680425274601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2680433663249) 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, 50726887 + ... + 50779699.

It is an arithmetic number, because the mean of its divisors is an integer number (307748991391).

Almost surely, 2^{2680433663209} is an apocalyptic number.

2680433663209 is the 1637203-rd square number.

2680433663209 is the 818602-nd centered octagonal number.

It is an amenable number.

2680433663209 is a deficient number, since it is larger than the sum of its proper divisors (89307259310).

2680433663209 is an frugal number, since it uses more digits than its factorization.

2680433663209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105688 (or 52844 counting only the distinct ones).

The product of its (nonzero) digits is 6718464, while the sum is 52.

The spelling of 2680433663209 in words is "two trillion, six hundred eighty billion, four hundred thirty-three million, six hundred sixty-three thousand, two hundred nine".