205709964216 has 16 divisors (see below), whose sum is σ = 514274910600. Its totient is φ = 68569988064.

The previous prime is 205709964211. The next prime is 205709964283. The reversal of 205709964216 is 612469907502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205709964211) 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, 4285624231 + ... + 4285624278.

Almost surely, 2^205709964216 is an apocalyptic number.

It is an amenable number.

205709964216 is an abundant number, since it is smaller than the sum of its proper divisors (308564946384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

205709964216 is a wasteful number, since it uses less digits than its factorization.

205709964216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8571248518 (or 8571248514 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 51.

The spelling of 205709964216 in words is "two hundred five billion, seven hundred nine million, nine hundred sixty-four thousand, two hundred sixteen".