638822048713 has 4 divisors (see below), whose sum is σ = 646908403840. Its totient is φ = 630735693588.

The previous prime is 638822048651. The next prime is 638822048797. The reversal of 638822048713 is 317840228836.

It is a happy number.

638822048713 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 638822048713 - 2⁹ = 638822048201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (638822048113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4043177445 + ... + 4043177602.

It is an arithmetic number, because the mean of its divisors is an integer number (161727100960).

Almost surely, 2^638822048713 is an apocalyptic number.

It is an amenable number.

638822048713 is a deficient number, since it is larger than the sum of its proper divisors (8086355127).

638822048713 is an equidigital number, since it uses as much as digits as its factorization.

638822048713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8086355126.

The product of its (nonzero) digits is 3096576, while the sum is 52.

The spelling of 638822048713 in words is "six hundred thirty-eight billion, eight hundred twenty-two million, forty-eight thousand, seven hundred thirteen".