12641517503 has 4 divisors (see below), whose sum is σ = 12659348280. Its totient is φ = 12623686728.

The previous prime is 12641517487. The next prime is 12641517517. The reversal of 12641517503 is 30571514621.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12641517503 - 2⁴ = 12641517487 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 (12641510503) 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, 8914325 + ... + 8915742.

It is an arithmetic number, because the mean of its divisors is an integer number (3164837070).

Almost surely, 2^12641517503 is an apocalyptic number.

12641517503 is a deficient number, since it is larger than the sum of its proper divisors (17830777).

12641517503 is an equidigital number, since it uses as much as digits as its factorization.

12641517503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17830776.

The product of its (nonzero) digits is 25200, while the sum is 35.

The spelling of 12641517503 in words is "twelve billion, six hundred forty-one million, five hundred seventeen thousand, five hundred three".