206449168005 has 18 divisors (see below), whose sum is σ = 357850507794. Its totient is φ = 110104597344.

The previous prime is 206449167989. The next prime is 206449168067. The reversal of 206449168005 is 500861944602.

206449168005 is a `hidden beast` number, since 20 + 64 + 491 + 6 + 80 + 0 + 5 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 41691922596 + 164757245409 = 204186^2 + 405903^2 .

It is not a de Polignac number, because 206449168005 - 2⁴ = 206449167989 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3014119 + ... + 3081851.

Almost surely, 2^206449168005 is an apocalyptic number.

It is an amenable number.

206449168005 is a deficient number, since it is larger than the sum of its proper divisors (151401339789).

206449168005 is an frugal number, since it uses more digits than its factorization.

206449168005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135477 (or 67741 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

Multiplying 206449168005 by its sum of digits (45), we get a square (9290212560225 = 3047985²).

206449168005 divided by its sum of digits (45) gives a square (4587759289 = 67733²).

The spelling of 206449168005 in words is "two hundred six billion, four hundred forty-nine million, one hundred sixty-eight thousand, five".