2638875001389 has 12 divisors (see below), whose sum is σ = 3867442151328. Its totient is φ = 1599318182440.

The previous prime is 2638875001379. The next prime is 2638875001391. The reversal of 2638875001389 is 9831005788362.

2638875001389 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2638875001389 - 2³³ = 2630285066797 is a prime.

It is a super-2 number, since 2×2638875001389² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2638875001319) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3634813689 + ... + 3634814414.

It is an arithmetic number, because the mean of its divisors is an integer number (322286845944).

Almost surely, 2^{2638875001389} is an apocalyptic number.

It is an amenable number.

2638875001389 is a deficient number, since it is larger than the sum of its proper divisors (1228567149939).

2638875001389 is a wasteful number, since it uses less digits than its factorization.

2638875001389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7269628128 (or 7269628117 counting only the distinct ones).

The product of its (nonzero) digits is 17418240, while the sum is 60.

The spelling of 2638875001389 in words is "two trillion, six hundred thirty-eight billion, eight hundred seventy-five million, one thousand, three hundred eighty-nine".