12138495426 has 24 divisors (see below), whose sum is σ = 26305578624. Its totient is φ = 4045318200.

The previous prime is 12138495409. The next prime is 12138495443. The reversal of 12138495426 is 62459483121.

12138495426 is a `hidden beast` number, since 1 + 2 + 138 + 4 + 95 + 426 = 666.

12138495426 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12138495409) and next prime (12138495443).

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 11 ways as a sum of consecutive naturals, for example, 21015 + ... + 157221.

It is an arithmetic number, because the mean of its divisors is an integer number (1096065776).

Almost surely, 2^12138495426 is an apocalyptic number.

12138495426 is an abundant number, since it is smaller than the sum of its proper divisors (14167083198).

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

12138495426 is a wasteful number, since it uses less digits than its factorization.

12138495426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141166 (or 141163 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The spelling of 12138495426 in words is "twelve billion, one hundred thirty-eight million, four hundred ninety-five thousand, four hundred twenty-six".