206743063888 has 20 divisors (see below), whose sum is σ = 400585337460. Its totient is φ = 103366202624.

The previous prime is 206743063867. The next prime is 206743063903. The reversal of 206743063888 is 888360347602.

It can be written as a sum of positive squares in 2 ways, for example, as 82224415504 + 124518648384 = 286748^2 + 352872^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3133 + ... + 643036.

It is an arithmetic number, because the mean of its divisors is an integer number (20029266873).

Almost surely, 2^206743063888 is an apocalyptic number.

It is an amenable number.

206743063888 is a deficient number, since it is larger than the sum of its proper divisors (193842273572).

206743063888 is a wasteful number, since it uses less digits than its factorization.

206743063888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666174 (or 666168 counting only the distinct ones).

The product of its (nonzero) digits is 9289728, while the sum is 55.

The spelling of 206743063888 in words is "two hundred six billion, seven hundred forty-three million, sixty-three thousand, eight hundred eighty-eight".