12539476437 has 32 divisors (see below), whose sum is σ = 18097841664. Its totient is φ = 7692672000.

The previous prime is 12539476427. The next prime is 12539476447. The reversal of 12539476437 is 73467493521.

It is an interprime number because it is at equal distance from previous prime (12539476427) and next prime (12539476447).

It is not a de Polignac number, because 12539476437 - 2²⁰ = 12538427861 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a self number, because there is not a number n which added to its sum of digits gives 12539476437.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12539476427) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3116487 + ... + 3120507.

It is an arithmetic number, because the mean of its divisors is an integer number (565557552).

Almost surely, 2^12539476437 is an apocalyptic number.

12539476437 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

12539476437 is a deficient number, since it is larger than the sum of its proper divisors (5558365227).

12539476437 is a wasteful number, since it uses less digits than its factorization.

12539476437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5389.

The product of its digits is 3810240, while the sum is 51.

The spelling of 12539476437 in words is "twelve billion, five hundred thirty-nine million, four hundred seventy-six thousand, four hundred thirty-seven".