206039517845 has 16 divisors (see below), whose sum is σ = 285069093120. Its totient is φ = 140033935104.

The previous prime is 206039517841. The next prime is 206039517851. The reversal of 206039517845 is 548715930602.

It is a happy number.

It is not a de Polignac number, because 206039517845 - 2² = 206039517841 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 206039517793 and 206039517802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206039517841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26044025 + ... + 26051934.

It is an arithmetic number, because the mean of its divisors is an integer number (17816818320).

It is a 1-persistent number, because it is pandigital, but 2⋅206039517845 = 412079035690 is not.

Almost surely, 2^206039517845 is an apocalyptic number.

It is an amenable number.

206039517845 is a deficient number, since it is larger than the sum of its proper divisors (79029575275).

206039517845 is a wasteful number, since it uses less digits than its factorization.

206039517845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52096084.

The product of its (nonzero) digits is 1814400, while the sum is 50.

The spelling of 206039517845 in words is "two hundred six billion, thirty-nine million, five hundred seventeen thousand, eight hundred forty-five".