206140405417 has 8 divisors (see below), whose sum is σ = 218278301472. Its totient is φ = 194003841600.

The previous prime is 206140405403. The next prime is 206140405439. The reversal of 206140405417 is 714504041602.

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-206140405417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206140405477) 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, 5259 + ... + 642112.

It is an arithmetic number, because the mean of its divisors is an integer number (27284787684).

Almost surely, 2^206140405417 is an apocalyptic number.

It is an amenable number.

206140405417 is a deficient number, since it is larger than the sum of its proper divisors (12137896055).

206140405417 is a wasteful number, since it uses less digits than its factorization.

206140405417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666119.

The product of its (nonzero) digits is 26880, while the sum is 34.

The spelling of 206140405417 in words is "two hundred six billion, one hundred forty million, four hundred five thousand, four hundred seventeen".