160444420155421 has 2 divisors, whose sum is σ = 160444420155422. Its totient is φ = 160444420155420.

The previous prime is 160444420155413. The next prime is 160444420155431. The reversal of 160444420155421 is 124551024444061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 149847246746521 + 10597173408900 = 12241211^2 + 3255330^2 .

It is a cyclic number.

It is not a de Polignac number, because 160444420155421 - 2³ = 160444420155413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (160444420155431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80222210077710 + 80222210077711.

It is an arithmetic number, because the mean of its divisors is an integer number (80222210077711).

Almost surely, 2^{160444420155421} is an apocalyptic number.

It is an amenable number.

160444420155421 is a deficient number, since it is larger than the sum of its proper divisors (1).

160444420155421 is an equidigital number, since it uses as much as digits as its factorization.

160444420155421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 614400, while the sum is 43.

Adding to 160444420155421 its reverse (124551024444061), we get a palindrome (284995444599482).

The spelling of 160444420155421 in words is "one hundred sixty trillion, four hundred forty-four billion, four hundred twenty million, one hundred fifty-five thousand, four hundred twenty-one".