12758628205 has 4 divisors (see below), whose sum is σ = 15310353852. Its totient is φ = 10206902560.

The previous prime is 12758628191. The next prime is 12758628209. The reversal of 12758628205 is 50282685721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50282685721 = 23 ⋅2186203727.

It can be written as a sum of positive squares in 2 ways, for example, as 8981542441 + 3777085764 = 94771^2 + 61458^2 .

It is not a de Polignac number, because 12758628205 - 2¹³ = 12758620013 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 (12758628209) 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, 1275862816 + ... + 1275862825.

It is an arithmetic number, because the mean of its divisors is an integer number (3827588463).

Almost surely, 2^12758628205 is an apocalyptic number.

It is an amenable number.

12758628205 is a deficient number, since it is larger than the sum of its proper divisors (2551725647).

12758628205 is an equidigital number, since it uses as much as digits as its factorization.

12758628205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2551725646.

The product of its (nonzero) digits is 537600, while the sum is 46.

The spelling of 12758628205 in words is "twelve billion, seven hundred fifty-eight million, six hundred twenty-eight thousand, two hundred five".