644314546307 has 4 divisors (see below), whose sum is σ = 652470426720. Its totient is φ = 636158665896.

The previous prime is 644314546303. The next prime is 644314546319. The reversal of 644314546307 is 703645413446.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 644314546307 - 2² = 644314546303 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (644314546303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4077940088 + ... + 4077940245.

It is an arithmetic number, because the mean of its divisors is an integer number (163117606680).

Almost surely, 2^644314546307 is an apocalyptic number.

644314546307 is a deficient number, since it is larger than the sum of its proper divisors (8155880413).

644314546307 is an equidigital number, since it uses as much as digits as its factorization.

644314546307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8155880412.

The product of its (nonzero) digits is 2903040, while the sum is 47.

The spelling of 644314546307 in words is "six hundred forty-four billion, three hundred fourteen million, five hundred forty-six thousand, three hundred seven".