206644416564 has 24 divisors (see below), whose sum is σ = 484239712320. Its totient is φ = 68585842624.

The previous prime is 206644416557. The next prime is 206644416577. The reversal of 206644416564 is 465614446602.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 36950784 + ... + 36956375.

It is an arithmetic number, because the mean of its divisors is an integer number (20176654680).

Almost surely, 2^206644416564 is an apocalyptic number.

It is an amenable number.

206644416564 is an abundant number, since it is smaller than the sum of its proper divisors (277595295756).

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

206644416564 is a wasteful number, since it uses less digits than its factorization.

206644416564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73907399 (or 73907397 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 48.

The spelling of 206644416564 in words is "two hundred six billion, six hundred forty-four million, four hundred sixteen thousand, five hundred sixty-four".