320660563421243 has 4 divisors (see below), whose sum is σ = 321672110940240. Its totient is φ = 319649015902248.

The previous prime is 320660563421147. The next prime is 320660563421281. The reversal of 320660563421243 is 342124365066023.

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 320660563421243 - 2¹⁴ = 320660563404859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320660563429243) 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, 505773759023 + ... + 505773759656.

It is an arithmetic number, because the mean of its divisors is an integer number (80418027735060).

Almost surely, 2^{320660563421243} is an apocalyptic number.

320660563421243 is a deficient number, since it is larger than the sum of its proper divisors (1011547518997).

320660563421243 is a wasteful number, since it uses less digits than its factorization.

320660563421243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1011547518996.

The product of its (nonzero) digits is 3732480, while the sum is 47.

The spelling of 320660563421243 in words is "three hundred twenty trillion, six hundred sixty billion, five hundred sixty-three million, four hundred twenty-one thousand, two hundred forty-three".