12653604605 has 4 divisors (see below), whose sum is σ = 15184325532. Its totient is φ = 10122883680.

The previous prime is 12653604589. The next prime is 12653604619. The reversal of 12653604605 is 50640635621.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50640635621 = 31 ⋅1633568891.

It can be written as a sum of positive squares in 2 ways, for example, as 5639709604 + 7013895001 = 75098^2 + 83749^2 .

It is not a de Polignac number, because 12653604605 - 2⁴ = 12653604589 is a prime.

It is a super-2 number, since 2×12653604605² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1265360456 + ... + 1265360465.

It is an arithmetic number, because the mean of its divisors is an integer number (3796081383).

Almost surely, 2^12653604605 is an apocalyptic number.

It is an amenable number.

12653604605 is a deficient number, since it is larger than the sum of its proper divisors (2530720927).

12653604605 is an equidigital number, since it uses as much as digits as its factorization.

12653604605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2530720926.

The product of its (nonzero) digits is 129600, while the sum is 38.

The spelling of 12653604605 in words is "twelve billion, six hundred fifty-three million, six hundred four thousand, six hundred five".