12506361503 has 4 divisors (see below), whose sum is σ = 12508421520. Its totient is φ = 12504301488.

The previous prime is 12506361499. The next prime is 12506361529. The reversal of 12506361503 is 30516360521.

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 12506361503 - 2² = 12506361499 is a prime.

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 12506361503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12506369503) 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, 1020875 + ... + 1033052.

It is an arithmetic number, because the mean of its divisors is an integer number (3127105380).

Almost surely, 2^12506361503 is an apocalyptic number.

12506361503 is a deficient number, since it is larger than the sum of its proper divisors (2060017).

12506361503 is an equidigital number, since it uses as much as digits as its factorization.

12506361503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2060016.

The product of its (nonzero) digits is 16200, while the sum is 32.

The spelling of 12506361503 in words is "twelve billion, five hundred six million, three hundred sixty-one thousand, five hundred three".