320451367889 has 2 divisors, whose sum is σ = 320451367890. Its totient is φ = 320451367888.

The previous prime is 320451367867. The next prime is 320451367913. The reversal of 320451367889 is 988763154023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 314487667264 + 5963700625 = 560792^2 + 77225^2 .

It is a cyclic number.

It is not a de Polignac number, because 320451367889 - 2³⁶ = 251731891153 is a prime.

It is a super-3 number, since 3×320451367889³ (a number of 35 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (320451363889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160225683944 + 160225683945.

It is an arithmetic number, because the mean of its divisors is an integer number (160225683945).

It is a 1-persistent number, because it is pandigital, but 2⋅320451367889 = 640902735778 is not.

Almost surely, 2^320451367889 is an apocalyptic number.

It is an amenable number.

320451367889 is a deficient number, since it is larger than the sum of its proper divisors (1).

320451367889 is an equidigital number, since it uses as much as digits as its factorization.

320451367889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8709120, while the sum is 56.

The spelling of 320451367889 in words is "three hundred twenty billion, four hundred fifty-one million, three hundred sixty-seven thousand, eight hundred eighty-nine".