206617520704 has 63 divisors (see below), whose sum is σ = 477005268873. Its totient is φ = 88539456768.

The previous prime is 206617520699. The next prime is 206617520777. The reversal of 206617520704 is 407025716602.

The square root of 206617520704 is 454552.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 187142760000 + 19474760704 = 432600^2 + 139552^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 25450854 + ... + 25458970.

Almost surely, 2^206617520704 is an apocalyptic number.

206617520704 is the 454552-nd square number.

It is an amenable number.

206617520704 is an abundant number, since it is smaller than the sum of its proper divisors (270387748169).

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

206617520704 is an frugal number, since it uses more digits than its factorization.

206617520704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16260 (or 8126 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 40.

The spelling of 206617520704 in words is "two hundred six billion, six hundred seventeen million, five hundred twenty thousand, seven hundred four".