12656587503 has 16 divisors (see below), whose sum is σ = 19550425856. Its totient is φ = 7133261760.

The previous prime is 12656587457. The next prime is 12656587507. The reversal of 12656587503 is 30578565621.

It is not a de Polignac number, because 12656587503 - 2¹⁶ = 12656521967 is a prime.

It is the 112502-nd Hogben number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12656587507) by changing a digit.

It is a nontrivial repunit in base 112501.

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 15 ways as a sum of consecutive naturals, for example, 4126513 + ... + 4129578.

It is an arithmetic number, because the mean of its divisors is an integer number (1221901616).

Almost surely, 2^12656587503 is an apocalyptic number.

12656587503 is a deficient number, since it is larger than the sum of its proper divisors (6893838353).

12656587503 is an equidigital number, since it uses as much as digits as its factorization.

12656587503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8256174.

The product of its (nonzero) digits is 1512000, while the sum is 48.

The spelling of 12656587503 in words is "twelve billion, six hundred fifty-six million, five hundred eighty-seven thousand, five hundred three".