162353561521 has 2 divisors, whose sum is σ = 162353561522. Its totient is φ = 162353561520.

The previous prime is 162353561507. The next prime is 162353561527. The reversal of 162353561521 is 125165353261.

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., 117555722496 + 44797839025 = 342864^2 + 211655^2 .

It is a cyclic number.

It is not a de Polignac number, because 162353561521 - 2²⁵ = 162320007089 is a prime.

It is not a weakly prime, because it can be changed into another prime (162353561527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81176780760 + 81176780761.

It is an arithmetic number, because the mean of its divisors is an integer number (81176780761).

Almost surely, 2^162353561521 is an apocalyptic number.

It is an amenable number.

162353561521 is a deficient number, since it is larger than the sum of its proper divisors (1).

162353561521 is an equidigital number, since it uses as much as digits as its factorization.

162353561521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 162000, while the sum is 40.

The spelling of 162353561521 in words is "one hundred sixty-two billion, three hundred fifty-three million, five hundred sixty-one thousand, five hundred twenty-one".