206678216311 has 16 divisors (see below), whose sum is σ = 241295500800. Its totient is φ = 173351531808.

The previous prime is 206678216293. The next prime is 206678216351. The reversal of 206678216311 is 113612876602.

It is not a de Polignac number, because 206678216311 - 2³³ = 198088281719 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206678216351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 594331 + ... + 875548.

It is an arithmetic number, because the mean of its divisors is an integer number (15080968800).

Almost surely, 2^206678216311 is an apocalyptic number.

206678216311 is a deficient number, since it is larger than the sum of its proper divisors (34617284489).

206678216311 is a wasteful number, since it uses less digits than its factorization.

206678216311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1470318.

The product of its (nonzero) digits is 145152, while the sum is 43.

The spelling of 206678216311 in words is "two hundred six billion, six hundred seventy-eight million, two hundred sixteen thousand, three hundred eleven".