320543246550563 has 4 divisors (see below), whose sum is σ = 320562778786008. Its totient is φ = 320523714315120.

The previous prime is 320543246550551. The next prime is 320543246550601. The reversal of 320543246550563 is 365055642345023.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320543246550563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320543246540563) 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, 9766093106 + ... + 9766125927.

It is an arithmetic number, because the mean of its divisors is an integer number (80140694696502).

Almost surely, 2^{320543246550563} is an apocalyptic number.

320543246550563 is a deficient number, since it is larger than the sum of its proper divisors (19532235445).

320543246550563 is a wasteful number, since it uses less digits than its factorization.

320543246550563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19532235444.

The product of its (nonzero) digits is 38880000, while the sum is 53.

Adding to 320543246550563 its reverse (365055642345023), we get a palindrome (685598888895586).

The spelling of 320543246550563 in words is "three hundred twenty trillion, five hundred forty-three billion, two hundred forty-six million, five hundred fifty thousand, five hundred sixty-three".