206171702005672 has 32 divisors (see below), whose sum is σ = 420600082026600. Its totient is φ = 94175178706944.

The previous prime is 206171702005609. The next prime is 206171702005673. The reversal of 206171702005672 is 276500207171602.

It can be written as a sum of positive squares in 4 ways, for example, as 125730785924676 + 80440916080996 = 11212974^2 + 8968886^2 .

It is not an unprimeable number, because it can be changed into a prime (206171702005673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10218650797 + ... + 10218670972.

Almost surely, 2^{206171702005672} is an apocalyptic number.

It is an amenable number.

206171702005672 is an abundant number, since it is smaller than the sum of its proper divisors (214428380020928).

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

206171702005672 is a wasteful number, since it uses less digits than its factorization.

206171702005672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20437321885 (or 20437321881 counting only the distinct ones).

The product of its (nonzero) digits is 493920, while the sum is 46.

The spelling of 206171702005672 in words is "two hundred six trillion, one hundred seventy-one billion, seven hundred two million, five thousand, six hundred seventy-two".