206685020859 has 16 divisors (see below), whose sum is σ = 278979552000. Its totient is φ = 136100585696.

The previous prime is 206685020833. The next prime is 206685020879. The reversal of 206685020859 is 958020586602.

206685020859 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 206685020859 - 2⁸ = 206685020603 is a prime.

It is not an unprimeable number, because it can be changed into a prime (206685020879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1211559 + ... + 1371584.

It is an arithmetic number, because the mean of its divisors is an integer number (17436222000).

Almost surely, 2^206685020859 is an apocalyptic number.

206685020859 is a deficient number, since it is larger than the sum of its proper divisors (72294531141).

206685020859 is a wasteful number, since it uses less digits than its factorization.

206685020859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2583474.

The product of its (nonzero) digits is 2073600, while the sum is 51.

The spelling of 206685020859 in words is "two hundred six billion, six hundred eighty-five million, twenty thousand, eight hundred fifty-nine".