320444434040431 has 2 divisors, whose sum is σ = 320444434040432. Its totient is φ = 320444434040430.

The previous prime is 320444434040429. The next prime is 320444434040477. The reversal of 320444434040431 is 134040434444023.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 320444434040431 - 2¹ = 320444434040429 is a prime.

It is a super-2 number, since 2×320444434040431² (a number of 30 digits) contains 22 as substring.

Together with 320444434040429, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320444434140431) 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, 160222217020215 + 160222217020216.

It is an arithmetic number, because the mean of its divisors is an integer number (160222217020216).

Almost surely, 2^{320444434040431} is an apocalyptic number.

320444434040431 is a deficient number, since it is larger than the sum of its proper divisors (1).

320444434040431 is an equidigital number, since it uses as much as digits as its factorization.

320444434040431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 884736, while the sum is 40.

Adding to 320444434040431 its reverse (134040434444023), we get a palindrome (454484868484454).

The spelling of 320444434040431 in words is "three hundred twenty trillion, four hundred forty-four billion, four hundred thirty-four million, forty thousand, four hundred thirty-one".