12564203323 has 8 divisors (see below), whose sum is σ = 14375284992. Its totient is φ = 10757170536.

The previous prime is 12564203317. The next prime is 12564203347. The reversal of 12564203323 is 32330246521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12564203323 - 2⁵ = 12564203291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12564203623) 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 7 ways as a sum of consecutive naturals, for example, 1005565 + ... + 1017982.

It is an arithmetic number, because the mean of its divisors is an integer number (1796910624).

Almost surely, 2^12564203323 is an apocalyptic number.

12564203323 is a deficient number, since it is larger than the sum of its proper divisors (1811081669).

12564203323 is an equidigital number, since it uses as much as digits as its factorization.

12564203323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2024441.

The product of its (nonzero) digits is 25920, while the sum is 31.

Adding to 12564203323 its reverse (32330246521), we get a palindrome (44894449844).

The spelling of 12564203323 in words is "twelve billion, five hundred sixty-four million, two hundred three thousand, three hundred twenty-three".