1304320325520 has 80 divisors (see below), whose sum is σ = 4043569444992. Its totient is φ = 347803576320.

The previous prime is 1304320325519. The next prime is 1304320325557. The reversal of 1304320325520 is 255230234031.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

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 in 15 ways as a sum of consecutive naturals, for example, 6063000 + ... + 6274440.

Almost surely, 2^{1304320325520} is an apocalyptic number.

1304320325520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1304320325520 is an abundant number, since it is smaller than the sum of its proper divisors (2739249119472).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1304320325520 is a wasteful number, since it uses less digits than its factorization.

1304320325520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237160 (or 237154 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 30.

Adding to 1304320325520 its reverse (255230234031), we get a palindrome (1559550559551).

The spelling of 1304320325520 in words is "one trillion, three hundred four billion, three hundred twenty million, three hundred twenty-five thousand, five hundred twenty".