206464646 has 8 divisors (see below), whose sum is σ = 312061464. Its totient is φ = 102444160.

The previous prime is 206464589. The next prime is 206464649. The reversal of 206464646 is 646464602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206464649) 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 3 ways as a sum of consecutive naturals, for example, 393755 + ... + 394278.

It is an arithmetic number, because the mean of its divisors is an integer number (39007683).

Almost surely, 2^206464646 is an apocalyptic number.

206464646 is a deficient number, since it is larger than the sum of its proper divisors (105596818).

206464646 is a wasteful number, since it uses less digits than its factorization.

206464646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788166.

The product of its (nonzero) digits is 165888, while the sum is 38.

The square root of 206464646 is about 14368.8776875579. The cubic root of 206464646 is about 591.0377656493.

The spelling of 206464646 in words is "two hundred six million, four hundred sixty-four thousand, six hundred forty-six".