644325110252 has 24 divisors (see below), whose sum is σ = 1195975112640. Its totient is φ = 302876804880.

The previous prime is 644325110239. The next prime is 644325110257. The reversal of 644325110252 is 252011523446.

It is not an unprimeable number, because it can be changed into a prime (644325110257) 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, 32348678 + ... + 32368589.

It is an arithmetic number, because the mean of its divisors is an integer number (49832296360).

Almost surely, 2^644325110252 is an apocalyptic number.

It is an amenable number.

644325110252 is a deficient number, since it is larger than the sum of its proper divisors (551650002388).

644325110252 is a wasteful number, since it uses less digits than its factorization.

644325110252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64717421 (or 64717419 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 35.

Adding to 644325110252 its reverse (252011523446), we get a palindrome (896336633698).

The spelling of 644325110252 in words is "six hundred forty-four billion, three hundred twenty-five million, one hundred ten thousand, two hundred fifty-two".