12015606503 has 4 divisors (see below), whose sum is σ = 12095180208. Its totient is φ = 11936032800.

The previous prime is 12015606481. The next prime is 12015606539. The reversal of 12015606503 is 30560651021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30560651021 = 53 ⋅576616057.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12015606503 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 (12015606563) 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, 39786626 + ... + 39786927.

It is an arithmetic number, because the mean of its divisors is an integer number (3023795052).

Almost surely, 2^12015606503 is an apocalyptic number.

12015606503 is a deficient number, since it is larger than the sum of its proper divisors (79573705).

12015606503 is an equidigital number, since it uses as much as digits as its factorization.

12015606503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79573704.

The product of its (nonzero) digits is 5400, while the sum is 29.

The spelling of 12015606503 in words is "twelve billion, fifteen million, six hundred six thousand, five hundred three".