12656502443 has 6 divisors (see below), whose sum is σ = 13704970284. Its totient is φ = 11682925176.

The previous prime is 12656502437. The next prime is 12656502457. The reversal of 12656502443 is 34420565621.

It is a de Polignac number, because none of the positive numbers 2^k-12656502443 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12656502397 and 12656502406.

It is not an unprimeable number, because it can be changed into a prime (12656502043) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 37445105 + ... + 37445442.

It is an arithmetic number, because the mean of its divisors is an integer number (2284161714).

Almost surely, 2^12656502443 is an apocalyptic number.

12656502443 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12656502443 is a deficient number, since it is larger than the sum of its proper divisors (1048467841).

12656502443 is an equidigital number, since it uses as much as digits as its factorization.

12656502443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74890573 (or 74890560 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 38.

The spelling of 12656502443 in words is "twelve billion, six hundred fifty-six million, five hundred two thousand, four hundred forty-three".