644501234324315 has 16 divisors (see below), whose sum is σ = 820937819888640. Its totient is φ = 484061364172800.

The previous prime is 644501234324293. The next prime is 644501234324341. The reversal of 644501234324315 is 513423432105446.

It is not a de Polignac number, because 644501234324315 - 2²⁸ = 644500965888859 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 644501234324315.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9454289435 + ... + 9454357604.

It is an arithmetic number, because the mean of its divisors is an integer number (51308613743040).

Almost surely, 2^{644501234324315} is an apocalyptic number.

644501234324315 is a deficient number, since it is larger than the sum of its proper divisors (176436585564325).

644501234324315 is a wasteful number, since it uses less digits than its factorization.

644501234324315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18908647462.

The product of its (nonzero) digits is 4147200, while the sum is 47.

The spelling of 644501234324315 in words is "six hundred forty-four trillion, five hundred one billion, two hundred thirty-four million, three hundred twenty-four thousand, three hundred fifteen".