320144625304549 has 2 divisors, whose sum is σ = 320144625304550. Its totient is φ = 320144625304548.

The previous prime is 320144625304499. The next prime is 320144625304571. The reversal of 320144625304549 is 945403526441023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 308193824702500 + 11950800602049 = 17555450^2 + 3456993^2 .

It is a cyclic number.

It is not a de Polignac number, because 320144625304549 - 2¹¹ = 320144625302501 is a prime.

It is a super-2 number, since 2×320144625304549² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 320144625304496 and 320144625304505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320144625394549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160072312652274 + 160072312652275.

It is an arithmetic number, because the mean of its divisors is an integer number (160072312652275).

Almost surely, 2^{320144625304549} is an apocalyptic number.

It is an amenable number.

320144625304549 is a deficient number, since it is larger than the sum of its proper divisors (1).

320144625304549 is an equidigital number, since it uses as much as digits as its factorization.

320144625304549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12441600, while the sum is 52.

The spelling of 320144625304549 in words is "three hundred twenty trillion, one hundred forty-four billion, six hundred twenty-five million, three hundred four thousand, five hundred forty-nine".