12539442426 has 32 divisors (see below), whose sum is σ = 30170088960. Its totient is φ = 3394134576.

The previous prime is 12539442389. The next prime is 12539442439. The reversal of 12539442426 is 62424493521.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7855996 + ... + 7857591.

It is an arithmetic number, because the mean of its divisors is an integer number (942815280).

Almost surely, 2^12539442426 is an apocalyptic number.

12539442426 is an abundant number, since it is smaller than the sum of its proper divisors (17630646534).

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

12539442426 is a wasteful number, since it uses less digits than its factorization.

12539442426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15713618.

The product of its digits is 414720, while the sum is 42.

The spelling of 12539442426 in words is "twelve billion, five hundred thirty-nine million, four hundred forty-two thousand, four hundred twenty-six".