206694281688 has 16 divisors (see below), whose sum is σ = 516735704280. Its totient is φ = 68898093888.

The previous prime is 206694281627. The next prime is 206694281699. The reversal of 206694281688 is 886182496602.

206694281688 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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, 4306130845 + ... + 4306130892.

Almost surely, 2^206694281688 is an apocalyptic number.

It is an amenable number.

206694281688 is an abundant number, since it is smaller than the sum of its proper divisors (310041422592).

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

206694281688 is a wasteful number, since it uses less digits than its factorization.

206694281688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8612261746 (or 8612261742 counting only the distinct ones).

The product of its (nonzero) digits is 15925248, while the sum is 60.

The spelling of 206694281688 in words is "two hundred six billion, six hundred ninety-four million, two hundred eighty-one thousand, six hundred eighty-eight".