644714930459 has 8 divisors (see below), whose sum is σ = 708153699840. Its totient is φ = 584226801576.

The previous prime is 644714930401. The next prime is 644714930479. The reversal of 644714930459 is 954039417446.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-644714930459 is a prime.

It is not an unprimeable number, because it can be changed into a prime (644714930479) 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, 737659667 + ... + 737660540.

It is an arithmetic number, because the mean of its divisors is an integer number (88519212480).

Almost surely, 2^644714930459 is an apocalyptic number.

644714930459 is a deficient number, since it is larger than the sum of its proper divisors (63438769381).

644714930459 is a wasteful number, since it uses less digits than its factorization.

644714930459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1475320249.

The product of its (nonzero) digits is 13063680, while the sum is 56.

The spelling of 644714930459 in words is "six hundred forty-four billion, seven hundred fourteen million, nine hundred thirty thousand, four hundred fifty-nine".