206403299688 has 64 divisors (see below), whose sum is σ = 531086353920. Its totient is φ = 66819614400.

The previous prime is 206403299671. The next prime is 206403299701. The reversal of 206403299688 is 886992304602.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 789778 + ... + 1018113.

It is an arithmetic number, because the mean of its divisors is an integer number (8298224280).

Almost surely, 2^206403299688 is an apocalyptic number.

It is an amenable number.

206403299688 is an abundant number, since it is smaller than the sum of its proper divisors (324683054232).

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

206403299688 is a wasteful number, since it uses less digits than its factorization.

206403299688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1808038 (or 1808034 counting only the distinct ones).

The product of its (nonzero) digits is 8957952, while the sum is 57.

The spelling of 206403299688 in words is "two hundred six billion, four hundred three million, two hundred ninety-nine thousand, six hundred eighty-eight".