646049223 has 8 divisors (see below), whose sum is σ = 957110000. Its totient is φ = 430699464.

The previous prime is 646049221. The next prime is 646049237. The reversal of 646049223 is 322940646.

646049223 is a `hidden beast` number, since 646 + 0 + 4 + 9 + 2 + 2 + 3 = 666.

It is not a de Polignac number, because 646049223 - 2¹ = 646049221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646049221) 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, 11963848 + ... + 11963901.

It is an arithmetic number, because the mean of its divisors is an integer number (119638750).

Almost surely, 2^646049223 is an apocalyptic number.

646049223 is a deficient number, since it is larger than the sum of its proper divisors (311060777).

646049223 is a wasteful number, since it uses less digits than its factorization.

646049223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23927758 (or 23927752 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The square root of 646049223 is about 25417.4983623487. The cubic root of 646049223 is about 864.4805028829.

Adding to 646049223 its reverse (322940646), we get a palindrome (968989869).

The spelling of 646049223 in words is "six hundred forty-six million, forty-nine thousand, two hundred twenty-three".