1388139138125 has 20 divisors (see below), whose sum is σ = 1790574132864. Its totient is φ = 1074688350000.

The previous prime is 1388139138101. The next prime is 1388139138137. The reversal of 1388139138125 is 5218319318831.

It is not a de Polignac number, because 1388139138125 - 2¹⁶ = 1388139072589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 35803571 + ... + 35842320.

Almost surely, 2^{1388139138125} is an apocalyptic number.

It is an amenable number.

1388139138125 is a deficient number, since it is larger than the sum of its proper divisors (402434994739).

1388139138125 is an frugal number, since it uses more digits than its factorization.

1388139138125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71645942 (or 71645927 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 53.

The spelling of 1388139138125 in words is "one trillion, three hundred eighty-eight billion, one hundred thirty-nine million, one hundred thirty-eight thousand, one hundred twenty-five".