206880308289 has 48 divisors (see below), whose sum is σ = 310098806784. Its totient is φ = 132819976800.

The previous prime is 206880308287. The next prime is 206880308293. The reversal of 206880308289 is 982803088602.

It is not a de Polignac number, because 206880308289 - 2¹ = 206880308287 is a prime.

It is not an unprimeable number, because it can be changed into a prime (206880308281) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15700674 + ... + 15713844.

It is an arithmetic number, because the mean of its divisors is an integer number (6460391808).

Almost surely, 2^206880308289 is an apocalyptic number.

It is an amenable number.

206880308289 is a deficient number, since it is larger than the sum of its proper divisors (103218498495).

206880308289 is a wasteful number, since it uses less digits than its factorization.

206880308289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13818 (or 13815 counting only the distinct ones).

The product of its (nonzero) digits is 2654208, while the sum is 54.

The spelling of 206880308289 in words is "two hundred six billion, eight hundred eighty million, three hundred eight thousand, two hundred eighty-nine".