646446626 has 16 divisors (see below), whose sum is σ = 1109125440. Its totient is φ = 276815760.

The previous prime is 646446623. The next prime is 646446629. The reversal of 646446626 is 626644646.

It is an interprime number because it is at equal distance from previous prime (646446623) and next prime (646446629).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (646446623) 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, 1580 + ... + 35991.

It is an arithmetic number, because the mean of its divisors is an integer number (69320340).

Almost surely, 2^646446626 is an apocalyptic number.

646446626 is a deficient number, since it is larger than the sum of its proper divisors (462678814).

646446626 is a wasteful number, since it uses less digits than its factorization.

646446626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38809.

The product of its digits is 995328, while the sum is 44.

The square root of 646446626 is about 25425.3146686526. The cubic root of 646446626 is about 864.6577219530.

The spelling of 646446626 in words is "six hundred forty-six million, four hundred forty-six thousand, six hundred twenty-six".