12513638541 has 4 divisors (see below), whose sum is σ = 16684851392. Its totient is φ = 8342425692.

The previous prime is 12513638521. The next prime is 12513638567. The reversal of 12513638541 is 14583631521.

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.

It is not a de Polignac number, because 12513638541 - 2⁹ = 12513638029 is a prime.

It is a super-2 number, since 2×12513638541² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12513638541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12513638521) 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, 2085606421 + ... + 2085606426.

It is an arithmetic number, because the mean of its divisors is an integer number (4171212848).

Almost surely, 2^12513638541 is an apocalyptic number.

It is an amenable number.

12513638541 is a deficient number, since it is larger than the sum of its proper divisors (4171212851).

12513638541 is an equidigital number, since it uses as much as digits as its factorization.

12513638541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4171212850.

The product of its digits is 86400, while the sum is 39.

The spelling of 12513638541 in words is "twelve billion, five hundred thirteen million, six hundred thirty-eight thousand, five hundred forty-one".