206781712068 has 12 divisors (see below), whose sum is σ = 482490661520. Its totient is φ = 68927237352.

The previous prime is 206781712051. The next prime is 206781712069. The reversal of 206781712068 is 860217187602.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (206781712069) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8615904658 + ... + 8615904681.

Almost surely, 2^206781712068 is an apocalyptic number.

It is an amenable number.

206781712068 is an abundant number, since it is smaller than the sum of its proper divisors (275708949452).

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

206781712068 is a wasteful number, since it uses less digits than its factorization.

206781712068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17231809346 (or 17231809344 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 48.

The spelling of 206781712068 in words is "two hundred six billion, seven hundred eighty-one million, seven hundred twelve thousand, sixty-eight".