206166025102345 has 64 divisors (see below), whose sum is σ = 309341920665600. Its totient is φ = 128145779919360.

The previous prime is 206166025102259. The next prime is 206166025102403. The reversal of 206166025102345 is 543201520661602.

It is not a de Polignac number, because 206166025102345 - 2¹¹ = 206166025100297 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1217174821 + ... + 1217344189.

It is an arithmetic number, because the mean of its divisors is an integer number (4833467510400).

Almost surely, 2^{206166025102345} is an apocalyptic number.

It is an amenable number.

206166025102345 is a deficient number, since it is larger than the sum of its proper divisors (103175895563255).

206166025102345 is a wasteful number, since it uses less digits than its factorization.

206166025102345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178558.

The product of its (nonzero) digits is 518400, while the sum is 43.

Adding to 206166025102345 its reverse (543201520661602), we get a palindrome (749367545763947).

The spelling of 206166025102345 in words is "two hundred six trillion, one hundred sixty-six billion, twenty-five million, one hundred two thousand, three hundred forty-five".