320044043857 has 2 divisors, whose sum is σ = 320044043858. Its totient is φ = 320044043856.

The previous prime is 320044043831. The next prime is 320044043861. The reversal of 320044043857 is 758340440023.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 287114860561 + 32929183296 = 535831^2 + 181464^2 .

It is a cyclic number.

It is not a de Polignac number, because 320044043857 - 2¹¹ = 320044041809 is a prime.

It is not a weakly prime, because it can be changed into another prime (320044043887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160022021928 + 160022021929.

It is an arithmetic number, because the mean of its divisors is an integer number (160022021929).

Almost surely, 2^320044043857 is an apocalyptic number.

It is an amenable number.

320044043857 is a deficient number, since it is larger than the sum of its proper divisors (1).

320044043857 is an equidigital number, since it uses as much as digits as its factorization.

320044043857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 322560, while the sum is 40.

The spelling of 320044043857 in words is "three hundred twenty billion, forty-four million, forty-three thousand, eight hundred fifty-seven".