644450114 has 48 divisors (see below), whose sum is σ = 1218297024. Its totient is φ = 250266720.

The previous prime is 644450111. The next prime is 644450119. The reversal of 644450114 is 411054446.

It is a super-2 number, since 2×644450114² = 830631898869225992, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (644450111) 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 23 ways as a sum of consecutive naturals, for example, 943217 + ... + 943899.

It is an arithmetic number, because the mean of its divisors is an integer number (25381188).

Almost surely, 2^644450114 is an apocalyptic number.

644450114 is a deficient number, since it is larger than the sum of its proper divisors (573846910).

644450114 is a wasteful number, since it uses less digits than its factorization.

644450114 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1271 (or 1260 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 644450114 is about 25386.0220200015. The cubic root of 644450114 is about 863.7666559856.

The spelling of 644450114 in words is "six hundred forty-four million, four hundred fifty thousand, one hundred fourteen".