12315440403503 has 4 divisors (see below), whose sum is σ = 12324410135688. Its totient is φ = 12306470671320.

The previous prime is 12315440403499. The next prime is 12315440403517. The reversal of 12315440403503 is 30530404451321.

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 12315440403503 - 2² = 12315440403499 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 (12315440403523) 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, 4484864033 + ... + 4484866778.

It is an arithmetic number, because the mean of its divisors is an integer number (3081102533922).

Almost surely, 2^{12315440403503} is an apocalyptic number.

12315440403503 is a deficient number, since it is larger than the sum of its proper divisors (8969732185).

12315440403503 is an equidigital number, since it uses as much as digits as its factorization.

12315440403503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8969732184.

The product of its (nonzero) digits is 86400, while the sum is 35.

Adding to 12315440403503 its reverse (30530404451321), we get a palindrome (42845844854824).

The spelling of 12315440403503 in words is "twelve trillion, three hundred fifteen billion, four hundred forty million, four hundred three thousand, five hundred three".