206505650257216 has 28 divisors (see below), whose sum is σ = 409839368887060. Its totient is φ = 103239037624320.

The previous prime is 206505650257147. The next prime is 206505650257253. The reversal of 206505650257216 is 612752056505602.

It can be written as a sum of positive squares in 2 ways, for example, as 166526636430400 + 39979013826816 = 12904520^2 + 6322896^2 .

It is a super-2 number, since 2×206505650257216² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 214946715 + ... + 215905306.

It is an arithmetic number, because the mean of its divisors is an integer number (14637120317395).

Almost surely, 2^{206505650257216} is an apocalyptic number.

It is an amenable number.

206505650257216 is a deficient number, since it is larger than the sum of its proper divisors (203333718629844).

206505650257216 is an equidigital number, since it uses as much as digits as its factorization.

206505650257216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430859522 (or 430859512 counting only the distinct ones).

The product of its (nonzero) digits is 7560000, while the sum is 52.

The spelling of 206505650257216 in words is "two hundred six trillion, five hundred five billion, six hundred fifty million, two hundred fifty-seven thousand, two hundred sixteen".