206005641 has 16 divisors (see below), whose sum is σ = 287179776. Its totient is φ = 131107856.

The previous prime is 206005621. The next prime is 206005649. The reversal of 206005641 is 146500602.

It is a cyclic number.

It is not a de Polignac number, because 206005641 - 2¹⁷ = 205874569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (206005649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36196 + ... + 41498.

It is an arithmetic number, because the mean of its divisors is an integer number (17948736).

Almost surely, 2^206005641 is an apocalyptic number.

It is an amenable number.

206005641 is a deficient number, since it is larger than the sum of its proper divisors (81174135).

206005641 is a wasteful number, since it uses less digits than its factorization.

206005641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5892.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 206005641 is about 14352.8966066087. The cubic root of 206005641 is about 590.5994491564.

The spelling of 206005641 in words is "two hundred six million, five thousand, six hundred forty-one".