644341514 has 16 divisors (see below), whose sum is σ = 1024653888. Its totient is φ = 302837952.

The previous prime is 644341513. The next prime is 644341549. The reversal of 644341514 is 415143446.

It is not an unprimeable number, because it can be changed into a prime (644341513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16469 + ... + 39495.

It is an arithmetic number, because the mean of its divisors is an integer number (64040868).

Almost surely, 2^644341514 is an apocalyptic number.

644341514 is a deficient number, since it is larger than the sum of its proper divisors (380312374).

644341514 is a wasteful number, since it uses less digits than its factorization.

644341514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23869.

The product of its digits is 23040, while the sum is 32.

The square root of 644341514 is about 25383.8829574988. The cubic root of 644341514 is about 863.7181338287.

The spelling of 644341514 in words is "six hundred forty-four million, three hundred forty-one thousand, five hundred fourteen".