644527002232 has 16 divisors (see below), whose sum is σ = 1208545928640. Its totient is φ = 322248087936.

The previous prime is 644527002199. The next prime is 644527002239. The reversal of 644527002232 is 232200725446.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 644527002191 and 644527002200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (644527002239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1747953 + ... + 2084320.

It is an arithmetic number, because the mean of its divisors is an integer number (75534120540).

Almost surely, 2^644527002232 is an apocalyptic number.

It is an amenable number.

644527002232 is a deficient number, since it is larger than the sum of its proper divisors (564018926408).

644527002232 is a wasteful number, since it uses less digits than its factorization.

644527002232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3853302 (or 3853298 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 37.

Adding to 644527002232 its reverse (232200725446), we get a palindrome (876727727678).

The spelling of 644527002232 in words is "six hundred forty-four billion, five hundred twenty-seven million, two thousand, two hundred thirty-two".