206811540104 has 32 divisors (see below), whose sum is σ = 442164948120. Its totient is φ = 89836686336.

The previous prime is 206811540083. The next prime is 206811540113. The reversal of 206811540104 is 401045118602.

It can be written as a sum of positive squares in 4 ways, for example, as 136676611204 + 70134928900 = 369698^2 + 264830^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58485659 + ... + 58489194.

Almost surely, 2^206811540104 is an apocalyptic number.

It is an amenable number.

206811540104 is an abundant number, since it is smaller than the sum of its proper divisors (235353408016).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

206811540104 is a wasteful number, since it uses less digits than its factorization.

206811540104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116974889 (or 116974885 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 32.

Adding to 206811540104 its reverse (401045118602), we get a palindrome (607856658706).

The spelling of 206811540104 in words is "two hundred six billion, eight hundred eleven million, five hundred forty thousand, one hundred four".