12547987503 has 4 divisors (see below), whose sum is σ = 16730650008. Its totient is φ = 8365325000.

The previous prime is 12547987499. The next prime is 12547987513. The reversal of 12547987503 is 30578974521.

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 12547987503 - 2² = 12547987499 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12547987513) 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, 2091331248 + ... + 2091331253.

It is an arithmetic number, because the mean of its divisors is an integer number (4182662502).

Almost surely, 2^12547987503 is an apocalyptic number.

12547987503 is a deficient number, since it is larger than the sum of its proper divisors (4182662505).

12547987503 is an equidigital number, since it uses as much as digits as its factorization.

12547987503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4182662504.

The product of its (nonzero) digits is 2116800, while the sum is 51.

The spelling of 12547987503 in words is "twelve billion, five hundred forty-seven million, nine hundred eighty-seven thousand, five hundred three".