12138660504 has 96 divisors (see below), whose sum is σ = 34374693600. Its totient is φ = 3862425600.

The previous prime is 12138660497. The next prime is 12138660509. The reversal of 12138660504 is 40506683121.

It is a happy number.

12138660504 is a `hidden beast` number, since 1 + 2 + 13 + 86 + 60 + 504 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12138660509) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 835704 + ... + 850104.

It is an arithmetic number, because the mean of its divisors is an integer number (358069725).

Almost surely, 2^12138660504 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12138660504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17187346800).

12138660504 is an abundant number, since it is smaller than the sum of its proper divisors (22236033096).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12138660504 is a wasteful number, since it uses less digits than its factorization.

12138660504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14945 (or 14938 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 12138660504 in words is "twelve billion, one hundred thirty-eight million, six hundred sixty thousand, five hundred four".