12604340621 has 4 divisors (see below), whose sum is σ = 12673978044. Its totient is φ = 12534703200.

The previous prime is 12604340603. The next prime is 12604340633.

12604340621 is nontrivially palindromic in base 10.

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

It can be written as a sum of positive squares in 2 ways, for example, as 67059721 + 12537280900 = 8189^2 + 111970^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12604340621 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 (12604346621) 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, 34818440 + ... + 34818801.

It is an arithmetic number, because the mean of its divisors is an integer number (3168494511).

Almost surely, 2^12604340621 is an apocalyptic number.

It is an amenable number.

12604340621 is a deficient number, since it is larger than the sum of its proper divisors (69637423).

12604340621 is an equidigital number, since it uses as much as digits as its factorization.

12604340621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69637422.

The product of its (nonzero) digits is 6912, while the sum is 29.

The spelling of 12604340621 in words is "twelve billion, six hundred four million, three hundred forty thousand, six hundred twenty-one".