12514641521 has 4 divisors (see below), whose sum is σ = 12524662500. Its totient is φ = 12504620544.

The previous prime is 12514641497. The next prime is 12514641523.

It is a happy number.

12514641521 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 2562384400 + 9952257121 = 50620^2 + 99761^2 .

It is a cyclic number.

It is not a de Polignac number, because 12514641521 - 2¹⁰ = 12514640497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12514641523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5008616 + ... + 5011113.

It is an arithmetic number, because the mean of its divisors is an integer number (3131165625).

Almost surely, 2^12514641521 is an apocalyptic number.

It is an amenable number.

12514641521 is a deficient number, since it is larger than the sum of its proper divisors (10020979).

12514641521 is a wasteful number, since it uses less digits than its factorization.

12514641521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10020978.

The product of its digits is 9600, while the sum is 32.

The spelling of 12514641521 in words is "twelve billion, five hundred fourteen million, six hundred forty-one thousand, five hundred twenty-one".