12629508805 has 4 divisors (see below), whose sum is σ = 15155410572. Its totient is φ = 10103607040.

The previous prime is 12629508769. The next prime is 12629508809. The reversal of 12629508805 is 50880592621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50880592621 = 1657 ⋅30706453.

It can be written as a sum of positive squares in 2 ways, for example, as 9311864004 + 3317644801 = 96498^2 + 57599^2 .

It is not a de Polignac number, because 12629508805 - 2⁹ = 12629508293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12629508809) 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, 1262950876 + ... + 1262950885.

It is an arithmetic number, because the mean of its divisors is an integer number (3788852643).

Almost surely, 2^12629508805 is an apocalyptic number.

It is an amenable number.

12629508805 is a deficient number, since it is larger than the sum of its proper divisors (2525901767).

12629508805 is an equidigital number, since it uses as much as digits as its factorization.

12629508805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2525901766.

The product of its (nonzero) digits is 345600, while the sum is 46.

The spelling of 12629508805 in words is "twelve billion, six hundred twenty-nine million, five hundred eight thousand, eight hundred five".