205688767913 has 16 divisors (see below), whose sum is σ = 230164079040. Its totient is φ = 182669760000.

The previous prime is 205688767873. The next prime is 205688767919. The reversal of 205688767913 is 319767886502.

It is not a de Polignac number, because 205688767913 - 2¹⁸ = 205688505769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205688767919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1187468 + ... + 1349613.

It is an arithmetic number, because the mean of its divisors is an integer number (14385254940).

Almost surely, 2^205688767913 is an apocalyptic number.

It is an amenable number.

205688767913 is a deficient number, since it is larger than the sum of its proper divisors (24475311127).

205688767913 is a wasteful number, since it uses less digits than its factorization.

205688767913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2537368.

The product of its (nonzero) digits is 30481920, while the sum is 62.

The spelling of 205688767913 in words is "two hundred five billion, six hundred eighty-eight million, seven hundred sixty-seven thousand, nine hundred thirteen".