12618510613 has 4 divisors (see below), whose sum is σ = 12631017580. Its totient is φ = 12606003648.

The previous prime is 12618510607. The next prime is 12618510623. The reversal of 12618510613 is 31601581621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31601581621 = 53 ⋅596256257.

It can be written as a sum of positive squares in 2 ways, for example, as 5943947409 + 6674563204 = 77097^2 + 81698^2 .

It is a cyclic number.

It is not a de Polignac number, because 12618510613 - 2²⁹ = 12081639701 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 (12618510623) 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, 6251970 + ... + 6253987.

It is an arithmetic number, because the mean of its divisors is an integer number (3157754395).

Almost surely, 2^12618510613 is an apocalyptic number.

It is an amenable number.

12618510613 is a deficient number, since it is larger than the sum of its proper divisors (12506967).

12618510613 is a wasteful number, since it uses less digits than its factorization.

12618510613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12506966.

The product of its (nonzero) digits is 8640, while the sum is 34.

The spelling of 12618510613 in words is "twelve billion, six hundred eighteen million, five hundred ten thousand, six hundred thirteen".