644501234324316 has 24 divisors (see below), whose sum is σ = 1503845453093760. Its totient is φ = 214832424821872.

The previous prime is 644501234324293. The next prime is 644501234324341. The reversal of 644501234324316 is 613423432105446.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162958626 + ... + 166866761.

It is an arithmetic number, because the mean of its divisors is an integer number (62660227212240).

Almost surely, 2^{644501234324316} is an apocalyptic number.

It is an amenable number.

644501234324316 is an abundant number, since it is smaller than the sum of its proper divisors (859344218769444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

644501234324316 is a wasteful number, since it uses less digits than its factorization.

644501234324316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329988233 (or 329988231 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 48.

The spelling of 644501234324316 in words is "six hundred forty-four trillion, five hundred one billion, two hundred thirty-four million, three hundred twenty-four thousand, three hundred sixteen".