12315440403502 has 4 divisors (see below), whose sum is σ = 18473160605256. Its totient is φ = 6157720201750.

The previous prime is 12315440403499. The next prime is 12315440403517. The reversal of 12315440403502 is 20530404451321.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3078860100874 + ... + 3078860100877.

It is an arithmetic number, because the mean of its divisors is an integer number (4618290151314).

Almost surely, 2^{12315440403502} is an apocalyptic number.

12315440403502 is a deficient number, since it is larger than the sum of its proper divisors (6157720201754).

12315440403502 is an equidigital number, since it uses as much as digits as its factorization.

12315440403502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6157720201753.

The product of its (nonzero) digits is 57600, while the sum is 34.

Adding to 12315440403502 its reverse (20530404451321), we get a palindrome (32845844854823).

The spelling of 12315440403502 in words is "twelve trillion, three hundred fifteen billion, four hundred forty million, four hundred three thousand, five hundred two".