162135592981 has 2 divisors, whose sum is σ = 162135592982. Its totient is φ = 162135592980.

The previous prime is 162135592979. The next prime is 162135593003. The reversal of 162135592981 is 189295531261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118381412356 + 43754180625 = 344066^2 + 209175^2 .

It is a cyclic number.

It is not a de Polignac number, because 162135592981 - 2¹ = 162135592979 is a prime.

It is a super-3 number, since 3×162135592981³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 162135592979, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (162135092981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81067796490 + 81067796491.

It is an arithmetic number, because the mean of its divisors is an integer number (81067796491).

Almost surely, 2^162135592981 is an apocalyptic number.

It is an amenable number.

162135592981 is a deficient number, since it is larger than the sum of its proper divisors (1).

162135592981 is an equidigital number, since it uses as much as digits as its factorization.

162135592981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1166400, while the sum is 52.

The spelling of 162135592981 in words is "one hundred sixty-two billion, one hundred thirty-five million, five hundred ninety-two thousand, nine hundred eighty-one".