638841144002 has 16 divisors (see below), whose sum is σ = 980346447360. Its totient is φ = 312082553088.

The previous prime is 638841144001. The next prime is 638841144037. The reversal of 638841144002 is 200441148836.

It is not an unprimeable number, because it can be changed into a prime (638841144001) by changing a digit.

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, 5835002 + ... + 5943477.

It is an arithmetic number, because the mean of its divisors is an integer number (61271652960).

Almost surely, 2^638841144002 is an apocalyptic number.

638841144002 is a deficient number, since it is larger than the sum of its proper divisors (341505303358).

638841144002 is a wasteful number, since it uses less digits than its factorization.

638841144002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11779105.

The product of its (nonzero) digits is 147456, while the sum is 41.

The spelling of 638841144002 in words is "six hundred thirty-eight billion, eight hundred forty-one million, one hundred forty-four thousand, two".