320343726624431 has 2 divisors, whose sum is σ = 320343726624432. Its totient is φ = 320343726624430.

The previous prime is 320343726624403. The next prime is 320343726624433. The reversal of 320343726624431 is 134426627343023.

It is a strong prime.

It is an emirp because it is prime and its reverse (134426627343023) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320343726624431 is a prime.

It is a super-2 number, since 2×320343726624431² (a number of 30 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 320343726624433, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 320343726624431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320343726624433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160171863312215 + 160171863312216.

It is an arithmetic number, because the mean of its divisors is an integer number (160171863312216).

Almost surely, 2^{320343726624431} is an apocalyptic number.

320343726624431 is a deficient number, since it is larger than the sum of its proper divisors (1).

320343726624431 is an equidigital number, since it uses as much as digits as its factorization.

320343726624431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10450944, while the sum is 50.

The spelling of 320343726624431 in words is "three hundred twenty trillion, three hundred forty-three billion, seven hundred twenty-six million, six hundred twenty-four thousand, four hundred thirty-one".