206338758123 has 4 divisors (see below), whose sum is σ = 275118344168. Its totient is φ = 137559172080.

The previous prime is 206338758113. The next prime is 206338758127. The reversal of 206338758123 is 321857833602.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 206338758123 - 2⁴ = 206338758107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206338758127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34389793018 + ... + 34389793023.

It is an arithmetic number, because the mean of its divisors is an integer number (68779586042).

Almost surely, 2^206338758123 is an apocalyptic number.

206338758123 is a deficient number, since it is larger than the sum of its proper divisors (68779586045).

206338758123 is an equidigital number, since it uses as much as digits as its factorization.

206338758123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68779586044.

The product of its (nonzero) digits is 1451520, while the sum is 48.

The spelling of 206338758123 in words is "two hundred six billion, three hundred thirty-eight million, seven hundred fifty-eight thousand, one hundred twenty-three".