162438381081 has 24 divisors (see below), whose sum is σ = 237833024000. Its totient is φ = 106818072192.

The previous prime is 162438381059. The next prime is 162438381089. The reversal of 162438381081 is 180183834261.

162438381081 is a `hidden beast` number, since 1 + 62 + 438 + 3 + 81 + 0 + 81 = 666.

162438381081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 162438381081 - 2⁷ = 162438380953 is a prime.

It is a super-3 number, since 3×162438381081³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (162438381089) 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 in 23 ways as a sum of consecutive naturals, for example, 628785 + ... + 848673.

Almost surely, 2^162438381081 is an apocalyptic number.

It is an amenable number.

162438381081 is a deficient number, since it is larger than the sum of its proper divisors (75394642919).

162438381081 is a wasteful number, since it uses less digits than its factorization.

162438381081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221013 (or 221010 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The spelling of 162438381081 in words is "one hundred sixty-two billion, four hundred thirty-eight million, three hundred eighty-one thousand, eighty-one".