2638138254038 has 16 divisors (see below), whose sum is σ = 4678471781280. Its totient is φ = 1091643415296.

The previous prime is 2638138254023. The next prime is 2638138254047. The reversal of 2638138254038 is 8304528318362.

2638138254038 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3248938331 + ... + 3248939142.

It is an arithmetic number, because the mean of its divisors is an integer number (292404486330).

Almost surely, 2^{2638138254038} is an apocalyptic number.

2638138254038 is a deficient number, since it is larger than the sum of its proper divisors (2040333527242).

2638138254038 is a wasteful number, since it uses less digits than its factorization.

2638138254038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6497877511.

The product of its (nonzero) digits is 6635520, while the sum is 53.

The spelling of 2638138254038 in words is "two trillion, six hundred thirty-eight billion, one hundred thirty-eight million, two hundred fifty-four thousand, thirty-eight".