646449110 has 8 divisors (see below), whose sum is σ = 1163608416. Its totient is φ = 258579640.

The previous prime is 646449101. The next prime is 646449113. The reversal of 646449110 is 11944646.

It is a happy number.

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 (646449113) 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, 32322446 + ... + 32322465.

It is an arithmetic number, because the mean of its divisors is an integer number (145451052).

Almost surely, 2^646449110 is an apocalyptic number.

646449110 is a deficient number, since it is larger than the sum of its proper divisors (517159306).

646449110 is a wasteful number, since it uses less digits than its factorization.

646449110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64644918.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 646449110 is about 25425.3635175586. The cubic root of 646449110 is about 864.6588294468.

The spelling of 646449110 in words is "six hundred forty-six million, four hundred forty-nine thousand, one hundred ten".