644322103036 has 24 divisors (see below), whose sum is σ = 1148911737120. Its totient is φ = 316062382272.

The previous prime is 644322103001. The next prime is 644322103091. The reversal of 644322103036 is 630301223446.

It is a junction number, because it is equal to n+sod(n) for n = 644322102992 and 644322103010.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3559570 + ... + 3736198.

It is an arithmetic number, because the mean of its divisors is an integer number (47871322380).

Almost surely, 2^644322103036 is an apocalyptic number.

It is an amenable number.

644322103036 is a deficient number, since it is larger than the sum of its proper divisors (504589634084).

644322103036 is a wasteful number, since it uses less digits than its factorization.

644322103036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193893 (or 193891 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 34.

The spelling of 644322103036 in words is "six hundred forty-four billion, three hundred twenty-two million, one hundred three thousand, thirty-six".