644325110234 has 16 divisors (see below), whose sum is σ = 1040872992768. Its totient is φ = 297369356592.

The previous prime is 644325110201. The next prime is 644325110239. The reversal of 644325110234 is 432011523446.

It is a junction number, because it is equal to n+sod(n) for n = 644325110194 and 644325110203.

It is not an unprimeable number, because it can be changed into a prime (644325110239) 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, 229559 + ... + 1158165.

It is an arithmetic number, because the mean of its divisors is an integer number (65054562048).

Almost surely, 2^644325110234 is an apocalyptic number.

644325110234 is a deficient number, since it is larger than the sum of its proper divisors (396547882534).

644325110234 is a wasteful number, since it uses less digits than its factorization.

644325110234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 955309.

The product of its (nonzero) digits is 69120, while the sum is 35.

The spelling of 644325110234 in words is "six hundred forty-four billion, three hundred twenty-five million, one hundred ten thousand, two hundred thirty-four".