206034665517 has 12 divisors (see below), whose sum is σ = 297910252380. Its totient is φ = 137215847808.

The previous prime is 206034665509. The next prime is 206034665563. The reversal of 206034665517 is 715566430602.

206034665517 is a `hidden beast` number, since 2 + 0 + 6 + 0 + 34 + 66 + 551 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 136032618276 + 70002047241 = 368826^2 + 264579^2 .

It is not a de Polignac number, because 206034665517 - 2³ = 206034665509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206034665017) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11707042 + ... + 11724627.

It is an arithmetic number, because the mean of its divisors is an integer number (24825854365).

Almost surely, 2^206034665517 is an apocalyptic number.

It is an amenable number.

206034665517 is a deficient number, since it is larger than the sum of its proper divisors (91875586863).

206034665517 is a wasteful number, since it uses less digits than its factorization.

206034665517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23432652 (or 23432649 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 45.

The spelling of 206034665517 in words is "two hundred six billion, thirty-four million, six hundred sixty-five thousand, five hundred seventeen".