162243725521 has 2 divisors, whose sum is σ = 162243725522. Its totient is φ = 162243725520.

The previous prime is 162243725513. The next prime is 162243725543. The reversal of 162243725521 is 125527342261.

162243725521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97606256400 + 64637469121 = 312420^2 + 254239^2 .

It is a cyclic number.

It is not a de Polignac number, because 162243725521 - 2³ = 162243725513 is a prime.

It is not a weakly prime, because it can be changed into another prime (162243725221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81121862760 + 81121862761.

It is an arithmetic number, because the mean of its divisors is an integer number (81121862761).

Almost surely, 2^162243725521 is an apocalyptic number.

It is an amenable number.

162243725521 is a deficient number, since it is larger than the sum of its proper divisors (1).

162243725521 is an equidigital number, since it uses as much as digits as its factorization.

162243725521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 201600, while the sum is 40.

The spelling of 162243725521 in words is "one hundred sixty-two billion, two hundred forty-three million, seven hundred twenty-five thousand, five hundred twenty-one".