206005730646 has 16 divisors (see below), whose sum is σ = 412488889344. Its totient is φ = 68589005544.

The previous prime is 206005730639. The next prime is 206005730731. The reversal of 206005730646 is 646037500602.

It is a super-2 number, since 2×206005730646² (a number of 23 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 7 ways as a sum of consecutive naturals, for example, 19887226 + ... + 19897581.

It is an arithmetic number, because the mean of its divisors is an integer number (25780555584).

Almost surely, 2^206005730646 is an apocalyptic number.

206005730646 is an abundant number, since it is smaller than the sum of its proper divisors (206483158698).

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

206005730646 is a wasteful number, since it uses less digits than its factorization.

206005730646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39785675.

The product of its (nonzero) digits is 181440, while the sum is 39.

The spelling of 206005730646 in words is "two hundred six billion, five million, seven hundred thirty thousand, six hundred forty-six".