12605063439 has 4 divisors (see below), whose sum is σ = 16806751256. Its totient is φ = 8403375624.

The previous prime is 12605063431. The next prime is 12605063441. The reversal of 12605063439 is 93436050621.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 12605063439 - 2³ = 12605063431 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12605063397 and 12605063406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12605063431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2100843904 + ... + 2100843909.

It is an arithmetic number, because the mean of its divisors is an integer number (4201687814).

Almost surely, 2^12605063439 is an apocalyptic number.

12605063439 is a deficient number, since it is larger than the sum of its proper divisors (4201687817).

12605063439 is an equidigital number, since it uses as much as digits as its factorization.

12605063439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4201687816.

The product of its (nonzero) digits is 116640, while the sum is 39.

The spelling of 12605063439 in words is "twelve billion, six hundred five million, sixty-three thousand, four hundred thirty-nine".