206565421160 has 48 divisors (see below), whose sum is σ = 540653377860. Its totient is φ = 70822429440.

The previous prime is 206565421121. The next prime is 206565421171. The reversal of 206565421160 is 61124565602.

It can be written as a sum of positive squares in 2 ways, for example, as 189609735364 + 16955685796 = 435442^2 + 130214^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52693301 + ... + 52697220.

Almost surely, 2^206565421160 is an apocalyptic number.

206565421160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206565421160 is an abundant number, since it is smaller than the sum of its proper divisors (334087956700).

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

206565421160 is a wasteful number, since it uses less digits than its factorization.

206565421160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105390546 (or 105390535 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 38.

Adding to 206565421160 its reverse (61124565602), we get a palindrome (267689986762).

The spelling of 206565421160 in words is "two hundred six billion, five hundred sixty-five million, four hundred twenty-one thousand, one hundred sixty".