1320564500447 has 4 divisors (see below), whose sum is σ = 1322853174336. Its totient is φ = 1318275826560.

The previous prime is 1320564500429. The next prime is 1320564500483. The reversal of 1320564500447 is 7440054650231.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1320564500447 - 2³⁸ = 1045686593503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320564550447) 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, 1144336079 + ... + 1144337232.

It is an arithmetic number, because the mean of its divisors is an integer number (330713293584).

Almost surely, 2^{1320564500447} is an apocalyptic number.

1320564500447 is a deficient number, since it is larger than the sum of its proper divisors (2288673889).

1320564500447 is an equidigital number, since it uses as much as digits as its factorization.

1320564500447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2288673888.

The product of its (nonzero) digits is 403200, while the sum is 41.

The spelling of 1320564500447 in words is "one trillion, three hundred twenty billion, five hundred sixty-four million, five hundred thousand, four hundred forty-seven".