644096514799 has 8 divisors (see below), whose sum is σ = 675773394560. Its totient is φ = 613100858400.

The previous prime is 644096514769. The next prime is 644096514863. The reversal of 644096514799 is 997415690446.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 644096514799 - 2¹¹ = 644096512751 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 644096514799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (644096514769) 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, 170303904 + ... + 170307685.

It is an arithmetic number, because the mean of its divisors is an integer number (84471674320).

Almost surely, 2^644096514799 is an apocalyptic number.

644096514799 is a deficient number, since it is larger than the sum of its proper divisors (31676879761).

644096514799 is a wasteful number, since it uses less digits than its factorization.

644096514799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340611681.

The product of its (nonzero) digits is 58786560, while the sum is 64.

The spelling of 644096514799 in words is "six hundred forty-four billion, ninety-six million, five hundred fourteen thousand, seven hundred ninety-nine".