12318715542 has 96 divisors (see below), whose sum is σ = 30799502208. Its totient is φ = 3263065344.

The previous prime is 12318715523. The next prime is 12318715543. The reversal of 12318715542 is 24551781321.

12318715542 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 12318715542.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12318715543) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 316473 + ... + 353259.

It is an arithmetic number, because the mean of its divisors is an integer number (320828148).

Almost surely, 2^12318715542 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12318715542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15399751104).

12318715542 is an abundant number, since it is smaller than the sum of its proper divisors (18480786666).

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

12318715542 is a wasteful number, since it uses less digits than its factorization.

12318715542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36890 (or 36883 counting only the distinct ones).

The product of its digits is 67200, while the sum is 39.

The spelling of 12318715542 in words is "twelve billion, three hundred eighteen million, seven hundred fifteen thousand, five hundred forty-two".