1320720532753 has 4 divisors (see below), whose sum is σ = 1390232139760. Its totient is φ = 1251208925748.

The previous prime is 1320720532723. The next prime is 1320720532799. The reversal of 1320720532753 is 3572350270231.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1320720532753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1320720532723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34755803475 + ... + 34755803512.

It is an arithmetic number, because the mean of its divisors is an integer number (347558034940).

Almost surely, 2^{1320720532753} is an apocalyptic number.

It is an amenable number.

1320720532753 is a deficient number, since it is larger than the sum of its proper divisors (69511607007).

1320720532753 is an equidigital number, since it uses as much as digits as its factorization.

1320720532753 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69511607006.

The product of its (nonzero) digits is 264600, while the sum is 40.

The spelling of 1320720532753 in words is "one trillion, three hundred twenty billion, seven hundred twenty million, five hundred thirty-two thousand, seven hundred fifty-three".