644104082 has 8 divisors (see below), whose sum is σ = 966467376. Its totient is φ = 321948292.

The previous prime is 644104079. The next prime is 644104093. The reversal of 644104082 is 280401446.

644104082 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43868 + ... + 56679.

It is an arithmetic number, because the mean of its divisors is an integer number (120808422).

Almost surely, 2^644104082 is an apocalyptic number.

644104082 is a deficient number, since it is larger than the sum of its proper divisors (322363294).

644104082 is a wasteful number, since it uses less digits than its factorization.

644104082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103752.

The product of its (nonzero) digits is 6144, while the sum is 29.

The square root of 644104082 is about 25379.2057007307. The cubic root of 644104082 is about 863.6120309243.

The spelling of 644104082 in words is "six hundred forty-four million, one hundred four thousand, eighty-two".