644269800014 has 32 divisors (see below), whose sum is σ = 974129974272. Its totient is φ = 319573296000.

The previous prime is 644269799983. The next prime is 644269800037. The reversal of 644269800014 is 410008962446.

It is a super-3 number, since 3×644269800014³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 132263999 + ... + 132268869.

It is an arithmetic number, because the mean of its divisors is an integer number (30441561696).

Almost surely, 2^644269800014 is an apocalyptic number.

644269800014 is a deficient number, since it is larger than the sum of its proper divisors (329860174258).

644269800014 is a wasteful number, since it uses less digits than its factorization.

644269800014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6152.

The product of its (nonzero) digits is 331776, while the sum is 44.

The spelling of 644269800014 in words is "six hundred forty-four billion, two hundred sixty-nine million, eight hundred thousand, fourteen".