1320320525503 has 6 divisors (see below), whose sum is σ = 1535883060336. Its totient is φ = 1131703307532.

The previous prime is 1320320525501. The next prime is 1320320525521. The reversal of 1320320525503 is 3055250230231.

It is not a de Polignac number, because 1320320525503 - 2¹ = 1320320525501 is a prime.

It is a super-3 number, since 3×1320320525503³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320320525501) by changing a digit.

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 in 5 ways as a sum of consecutive naturals, for example, 13472658375 + ... + 13472658472.

It is an arithmetic number, because the mean of its divisors is an integer number (255980510056).

Almost surely, 2^{1320320525503} is an apocalyptic number.

1320320525503 is a deficient number, since it is larger than the sum of its proper divisors (215562534833).

1320320525503 is an equidigital number, since it uses as much as digits as its factorization.

1320320525503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26945316861 (or 26945316854 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 31.

Adding to 1320320525503 its reverse (3055250230231), we get a palindrome (4375570755734).

The spelling of 1320320525503 in words is "one trillion, three hundred twenty billion, three hundred twenty million, five hundred twenty-five thousand, five hundred three".