1320782337489 has 4 divisors (see below), whose sum is σ = 1761043116656. Its totient is φ = 880521558324.

The previous prime is 1320782337481. The next prime is 1320782337503. The reversal of 1320782337489 is 9847332870231.

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 not a de Polignac number, because 1320782337489 - 2³ = 1320782337481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1320782337481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220130389579 + ... + 220130389584.

It is an arithmetic number, because the mean of its divisors is an integer number (440260779164).

Almost surely, 2^{1320782337489} is an apocalyptic number.

It is an amenable number.

1320782337489 is a deficient number, since it is larger than the sum of its proper divisors (440260779167).

1320782337489 is an equidigital number, since it uses as much as digits as its factorization.

1320782337489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440260779166.

The product of its (nonzero) digits is 12192768, while the sum is 57.

The spelling of 1320782337489 in words is "one trillion, three hundred twenty billion, seven hundred eighty-two million, three hundred thirty-seven thousand, four hundred eighty-nine".