1320504553505 has 8 divisors (see below), whose sum is σ = 1588853738472. Its totient is φ = 1053571459968.

The previous prime is 1320504553499. The next prime is 1320504553513. The reversal of 1320504553505 is 5053554050231.

It can be written as a sum of positive squares in 4 ways, for example, as 112635414544 + 1207869138961 = 335612^2 + 1099031^2 .

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 1320504553505 - 2¹² = 1320504549409 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 354020804 + ... + 354024533.

It is an arithmetic number, because the mean of its divisors is an integer number (198606717309).

Almost surely, 2^{1320504553505} is an apocalyptic number.

It is an amenable number.

1320504553505 is a deficient number, since it is larger than the sum of its proper divisors (268349184967).

1320504553505 is an equidigital number, since it uses as much as digits as its factorization.

1320504553505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 708045715.

The product of its (nonzero) digits is 225000, while the sum is 38.

The spelling of 1320504553505 in words is "one trillion, three hundred twenty billion, five hundred four million, five hundred fifty-three thousand, five hundred five".