12618604309 has 4 divisors (see below), whose sum is σ = 12626577216. Its totient is φ = 12610631404.

The previous prime is 12618604307. The next prime is 12618604367. The reversal of 12618604309 is 90340681621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90340681621 = 15583 ⋅5797387.

It is a cyclic number.

It is not a de Polignac number, because 12618604309 - 2¹ = 12618604307 is a prime.

It is a super-2 number, since 2×12618604309² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12618604307) 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, 3984079 + ... + 3987244.

It is an arithmetic number, because the mean of its divisors is an integer number (3156644304).

Almost surely, 2^12618604309 is an apocalyptic number.

It is an amenable number.

12618604309 is a deficient number, since it is larger than the sum of its proper divisors (7972907).

12618604309 is an equidigital number, since it uses as much as digits as its factorization.

12618604309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7972906.

The product of its (nonzero) digits is 62208, while the sum is 40.

The spelling of 12618604309 in words is "twelve billion, six hundred eighteen million, six hundred four thousand, three hundred nine".