206806656353 has 16 divisors (see below), whose sum is σ = 233910927360. Its totient is φ = 181139768400.

The previous prime is 206806656341. The next prime is 206806656373. The reversal of 206806656353 is 353656608602.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 206806656353 - 2¹⁰ = 206806655329 is a prime.

It is a super-2 number, since 2×206806656353² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (206806656373) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1258433 + ... + 1413246.

It is an arithmetic number, because the mean of its divisors is an integer number (14619432960).

Almost surely, 2^206806656353 is an apocalyptic number.

It is an amenable number.

206806656353 is a deficient number, since it is larger than the sum of its proper divisors (27104271007).

206806656353 is a wasteful number, since it uses less digits than its factorization.

206806656353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2671948.

The product of its (nonzero) digits is 4665600, while the sum is 50.

The spelling of 206806656353 in words is "two hundred six billion, eight hundred six million, six hundred fifty-six thousand, three hundred fifty-three".