644846553714 has 16 divisors (see below), whose sum is σ = 1406937935520. Its totient is φ = 195408046560.

The previous prime is 644846553707. The next prime is 644846553733. The reversal of 644846553714 is 417355648446.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4885201099 + ... + 4885201230.

It is an arithmetic number, because the mean of its divisors is an integer number (87933620970).

Almost surely, 2^644846553714 is an apocalyptic number.

644846553714 is an abundant number, since it is smaller than the sum of its proper divisors (762091381806).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

644846553714 is a wasteful number, since it uses less digits than its factorization.

644846553714 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9770402345.

The product of its digits is 38707200, while the sum is 57.

The spelling of 644846553714 in words is "six hundred forty-four billion, eight hundred forty-six million, five hundred fifty-three thousand, seven hundred fourteen".