206581133340717 has 32 divisors (see below), whose sum is σ = 277777352884224. Its totient is φ = 136554165316800.

The previous prime is 206581133340697. The next prime is 206581133340727. The reversal of 206581133340717 is 717043331185602.

It is not a de Polignac number, because 206581133340717 - 2²³ = 206581124952109 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 206581133340717.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206581133340727) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4671539667 + ... + 4671583887.

It is an arithmetic number, because the mean of its divisors is an integer number (8680542277632).

Almost surely, 2^{206581133340717} is an apocalyptic number.

It is an amenable number.

206581133340717 is a deficient number, since it is larger than the sum of its proper divisors (71196219543507).

206581133340717 is a wasteful number, since it uses less digits than its factorization.

206581133340717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51449.

The product of its (nonzero) digits is 2540160, while the sum is 51.

The spelling of 206581133340717 in words is "two hundred six trillion, five hundred eighty-one billion, one hundred thirty-three million, three hundred forty thousand, seven hundred seventeen".