38732681138 has 18 divisors (see below), whose sum is σ = 58415942781. Its totient is φ = 19261272504.

The previous prime is 38732681123. The next prime is 38732681149. The reversal of 38732681138 is 83118623783.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 28270050769 + 10462630369 = 168137^2 + 102287^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=139163.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 88229123 + ... + 88229561.

Almost surely, 2^38732681138 is an apocalyptic number.

38732681138 is a deficient number, since it is larger than the sum of its proper divisors (19683261643).

38732681138 is an frugal number, since it uses more digits than its factorization.

38732681138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1514 (or 758 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 50.

Multiplying 38732681138 by its sum of digits (50), we get a square (1936634056900 = 1391630²).

The spelling of 38732681138 in words is "thirty-eight billion, seven hundred thirty-two million, six hundred eighty-one thousand, one hundred thirty-eight".