206172344811 has 8 divisors (see below), whose sum is σ = 276432194880. Its totient is φ = 136680362312.

The previous prime is 206172344803. The next prime is 206172344897. The reversal of 206172344811 is 118443271602.

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 206172344811 - 2³ = 206172344803 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 206172344811.

It is not an unprimeable number, because it can be changed into a prime (206172345811) 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, 191966265 + ... + 191967338.

It is an arithmetic number, because the mean of its divisors is an integer number (34554024360).

Almost surely, 2^206172344811 is an apocalyptic number.

206172344811 is a deficient number, since it is larger than the sum of its proper divisors (70259850069).

206172344811 is a wasteful number, since it uses less digits than its factorization.

206172344811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383933785.

The product of its (nonzero) digits is 64512, while the sum is 39.

The spelling of 206172344811 in words is "two hundred six billion, one hundred seventy-two million, three hundred forty-four thousand, eight hundred eleven".