12138944539 has 8 divisors (see below), whose sum is σ = 12174786000. Its totient is φ = 12103133952.

The previous prime is 12138944533. The next prime is 12138944603. The reversal of 12138944539 is 93544983121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12138944539 - 2⁵ = 12138944507 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12138944492 and 12138944501.

It is not an unprimeable number, because it can be changed into a prime (12138944533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 950307 + ... + 962995.

It is an arithmetic number, because the mean of its divisors is an integer number (1521848250).

Almost surely, 2^12138944539 is an apocalyptic number.

12138944539 is a deficient number, since it is larger than the sum of its proper divisors (35841461).

12138944539 is a wasteful number, since it uses less digits than its factorization.

12138944539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15437.

The product of its digits is 933120, while the sum is 49.

The spelling of 12138944539 in words is "twelve billion, one hundred thirty-eight million, nine hundred forty-four thousand, five hundred thirty-nine".