12564023503 has 8 divisors (see below), whose sum is σ = 13007118528. Its totient is φ = 12128252544.

The previous prime is 12564023473. The next prime is 12564023531. The reversal of 12564023503 is 30532046521.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 12564023503 - 2¹³ = 12564015311 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 (12564027503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1827526 + ... + 1834387.

It is an arithmetic number, because the mean of its divisors is an integer number (1625889816).

Almost surely, 2^12564023503 is an apocalyptic number.

12564023503 is a deficient number, since it is larger than the sum of its proper divisors (443095025).

12564023503 is an equidigital number, since it uses as much as digits as its factorization.

12564023503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3662033.

The product of its (nonzero) digits is 21600, while the sum is 31.

The spelling of 12564023503 in words is "twelve billion, five hundred sixty-four million, twenty-three thousand, five hundred three".