206781912733 has 16 divisors (see below), whose sum is σ = 227121491520. Its totient is φ = 186703574400.

The previous prime is 206781912731. The next prime is 206781912763. The reversal of 206781912733 is 337219187602.

It is a cyclic number.

It is not a de Polignac number, because 206781912733 - 2¹ = 206781912731 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206781912731) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 839983 + ... + 1057891.

It is an arithmetic number, because the mean of its divisors is an integer number (14195093220).

Almost surely, 2^206781912733 is an apocalyptic number.

It is an amenable number.

206781912733 is a deficient number, since it is larger than the sum of its proper divisors (20339578787).

206781912733 is a wasteful number, since it uses less digits than its factorization.

206781912733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218508.

The product of its (nonzero) digits is 762048, while the sum is 49.

The spelling of 206781912733 in words is "two hundred six billion, seven hundred eighty-one million, nine hundred twelve thousand, seven hundred thirty-three".