320042543437 has 2 divisors, whose sum is σ = 320042543438. Its totient is φ = 320042543436.

The previous prime is 320042543423. The next prime is 320042543459. The reversal of 320042543437 is 734345240023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 175677501321 + 144365042116 = 419139^2 + 379954^2 .

It is a cyclic number.

It is not a de Polignac number, because 320042543437 - 2¹¹ = 320042541389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 320042543396 and 320042543405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320042541437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160021271718 + 160021271719.

It is an arithmetic number, because the mean of its divisors is an integer number (160021271719).

Almost surely, 2^320042543437 is an apocalyptic number.

It is an amenable number.

320042543437 is a deficient number, since it is larger than the sum of its proper divisors (1).

320042543437 is an equidigital number, since it uses as much as digits as its factorization.

320042543437 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 241920, while the sum is 37.

The spelling of 320042543437 in words is "three hundred twenty billion, forty-two million, five hundred forty-three thousand, four hundred thirty-seven".