1138389538381 has 12 divisors (see below), whose sum is σ = 1220051055132. Its totient is φ = 1058516598656.

The previous prime is 1138389538357. The next prime is 1138389538387. The reversal of 1138389538381 is 1838359838311.

It can be written as a sum of positive squares in 2 ways, for example, as 803235382756 + 335154155625 = 896234^2 + 578925^2 .

It is not a de Polignac number, because 1138389538381 - 2¹⁹ = 1138389014093 is a prime.

It is a super-2 number, since 2×1138389538381² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138389538387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4743106 + ... + 4977331.

It is an arithmetic number, because the mean of its divisors is an integer number (101670921261).

Almost surely, 2^{1138389538381} is an apocalyptic number.

It is an amenable number.

1138389538381 is a deficient number, since it is larger than the sum of its proper divisors (81661516751).

1138389538381 is an frugal number, since it uses more digits than its factorization.

1138389538381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9720620 (or 9720537 counting only the distinct ones).

The product of its digits is 14929920, while the sum is 61.

The spelling of 1138389538381 in words is "one trillion, one hundred thirty-eight billion, three hundred eighty-nine million, five hundred thirty-eight thousand, three hundred eighty-one".