638841144043 has 8 divisors (see below), whose sum is σ = 666933181200. Its totient is φ = 611153309088.

The previous prime is 638841144037. The next prime is 638841144107. The reversal of 638841144043 is 340441148836.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-638841144043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 638841143984 and 638841144002.

It is not an unprimeable number, because it can be changed into a prime (638841144743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101047321 + ... + 101053642.

It is an arithmetic number, because the mean of its divisors is an integer number (83366647650).

Almost surely, 2^638841144043 is an apocalyptic number.

638841144043 is a deficient number, since it is larger than the sum of its proper divisors (28092037157).

638841144043 is a wasteful number, since it uses less digits than its factorization.

638841144043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202101101.

The product of its (nonzero) digits is 884736, while the sum is 46.

The spelling of 638841144043 in words is "six hundred thirty-eight billion, eight hundred forty-one million, one hundred forty-four thousand, forty-three".