206827445989 has 4 divisors (see below), whose sum is σ = 206843309100. Its totient is φ = 206811582880.

The previous prime is 206827445983. The next prime is 206827446029. The reversal of 206827445989 is 989544728602.

It is a happy number.

206827445989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 127284832900 + 79542613089 = 356770^2 + 282033^2 .

It is a cyclic number.

It is not a de Polignac number, because 206827445989 - 2¹¹ = 206827443941 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 206827445989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206827445983) 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 3 ways as a sum of consecutive naturals, for example, 7911982 + ... + 7938079.

It is an arithmetic number, because the mean of its divisors is an integer number (51710827275).

Almost surely, 2^206827445989 is an apocalyptic number.

It is an amenable number.

206827445989 is a deficient number, since it is larger than the sum of its proper divisors (15863111).

206827445989 is a wasteful number, since it uses less digits than its factorization.

206827445989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15863110.

The product of its (nonzero) digits is 69672960, while the sum is 64.

The spelling of 206827445989 in words is "two hundred six billion, eight hundred twenty-seven million, four hundred forty-five thousand, nine hundred eighty-nine".