206563450165 has 8 divisors (see below), whose sum is σ = 260922252960. Its totient is φ = 156553351632.

The previous prime is 206563450141. The next prime is 206563450169. The reversal of 206563450165 is 561054365602.

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 206563450165 - 2¹⁷ = 206563319093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206563450169) 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, 1087175959 + ... + 1087176148.

It is an arithmetic number, because the mean of its divisors is an integer number (32615281620).

Almost surely, 2^206563450165 is an apocalyptic number.

It is an amenable number.

206563450165 is a deficient number, since it is larger than the sum of its proper divisors (54358802795).

206563450165 is a wasteful number, since it uses less digits than its factorization.

206563450165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2174352131.

The product of its (nonzero) digits is 648000, while the sum is 43.

The spelling of 206563450165 in words is "two hundred six billion, five hundred sixty-three million, four hundred fifty thousand, one hundred sixty-five".