206517340165 has 8 divisors (see below), whose sum is σ = 247823376120. Its totient is φ = 165212160192.

The previous prime is 206517340157. The next prime is 206517340231. The reversal of 206517340165 is 561043715602.

It can be written as a sum of positive squares in 4 ways, for example, as 51784463844 + 154732876321 = 227562^2 + 393361^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 206517340165 - 2³ = 206517340157 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 594447 + ... + 875443.

It is an arithmetic number, because the mean of its divisors is an integer number (30977922015).

Almost surely, 2^206517340165 is an apocalyptic number.

It is an amenable number.

206517340165 is a deficient number, since it is larger than the sum of its proper divisors (41306035955).

206517340165 is a wasteful number, since it uses less digits than its factorization.

206517340165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427991.

The product of its (nonzero) digits is 151200, while the sum is 40.

The spelling of 206517340165 in words is "two hundred six billion, five hundred seventeen million, three hundred forty thousand, one hundred sixty-five".