206801864917 has 8 divisors (see below), whose sum is σ = 209431198080. Its totient is φ = 204183939600.

The previous prime is 206801864903. The next prime is 206801864921. The reversal of 206801864917 is 719468108602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206801864917 is a prime.

It is a super-2 number, since 2×206801864917² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206801864957) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2815473 + ... + 2887990.

It is an arithmetic number, because the mean of its divisors is an integer number (26178899760).

Almost surely, 2^206801864917 is an apocalyptic number.

It is an amenable number.

206801864917 is a deficient number, since it is larger than the sum of its proper divisors (2629333163).

206801864917 is a wasteful number, since it uses less digits than its factorization.

206801864917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5703923.

The product of its (nonzero) digits is 1161216, while the sum is 52.

The spelling of 206801864917 in words is "two hundred six billion, eight hundred one million, eight hundred sixty-four thousand, nine hundred seventeen".