644565126314 has 32 divisors (see below), whose sum is σ = 1007170917120. Its totient is φ = 308999904192.

The previous prime is 644565126311. The next prime is 644565126319. The reversal of 644565126314 is 413621565446.

It is not an unprimeable number, because it can be changed into a prime (644565126311) 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 15 ways as a sum of consecutive naturals, for example, 11439599 + ... + 11495805.

It is an arithmetic number, because the mean of its divisors is an integer number (31474091160).

Almost surely, 2^644565126314 is an apocalyptic number.

644565126314 is a deficient number, since it is larger than the sum of its proper divisors (362605790806).

644565126314 is a wasteful number, since it uses less digits than its factorization.

644565126314 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57614.

The product of its digits is 2073600, while the sum is 47.

The spelling of 644565126314 in words is "six hundred forty-four billion, five hundred sixty-five million, one hundred twenty-six thousand, three hundred fourteen".