206571205106512 has 20 divisors (see below), whose sum is σ = 403153109240436. Its totient is φ = 102531693044480.

The previous prime is 206571205106507. The next prime is 206571205106527. The reversal of 206571205106512 is 215601502175602.

It can be written as a sum of positive squares in 2 ways, for example, as 144188125402896 + 62383079703616 = 12007836^2 + 7898296^2 .

It is a super-2 number, since 2×206571205106512² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47119342039 + ... + 47119346422.

Almost surely, 2^{206571205106512} is an apocalyptic number.

It is an amenable number.

206571205106512 is a deficient number, since it is larger than the sum of its proper divisors (196581904133924).

206571205106512 is a wasteful number, since it uses less digits than its factorization.

206571205106512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94238688606 (or 94238688600 counting only the distinct ones).

The product of its (nonzero) digits is 252000, while the sum is 43.

The spelling of 206571205106512 in words is "two hundred six trillion, five hundred seventy-one billion, two hundred five million, one hundred six thousand, five hundred twelve".