838138638671 has 64 divisors (see below), whose sum is σ = 954654916608. Its totient is φ = 731553005568.

The previous prime is 838138638641. The next prime is 838138638683. The reversal of 838138638671 is 176836831838.

838138638671 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 838138638671 - 2⁶ = 838138638607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (838138638641) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1358409155 + ... + 1358409771.

It is an arithmetic number, because the mean of its divisors is an integer number (14916483072).

Almost surely, 2^838138638671 is an apocalyptic number.

838138638671 is a deficient number, since it is larger than the sum of its proper divisors (116516277937).

838138638671 is a wasteful number, since it uses less digits than its factorization.

838138638671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1280.

The product of its digits is 27869184, while the sum is 62.

The spelling of 838138638671 in words is "eight hundred thirty-eight billion, one hundred thirty-eight million, six hundred thirty-eight thousand, six hundred seventy-one".