162438436989 has 16 divisors (see below), whose sum is σ = 240658648000. Its totient is φ = 108288191088.

The previous prime is 162438436987. The next prime is 162438437041. The reversal of 162438436989 is 989634834261.

162438436989 is a `hidden beast` number, since 1 + 62 + 438 + 4 + 3 + 69 + 89 = 666.

It is not a de Polignac number, because 162438436989 - 2¹ = 162438436987 is a prime.

It is a super-2 number, since 2×162438436989² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (162438436981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 724662 + ... + 921960.

It is an arithmetic number, because the mean of its divisors is an integer number (15041165500).

Almost surely, 2^162438436989 is an apocalyptic number.

It is an amenable number.

162438436989 is a deficient number, since it is larger than the sum of its proper divisors (78220211011).

162438436989 is a wasteful number, since it uses less digits than its factorization.

162438436989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227801 (or 227795 counting only the distinct ones).

The product of its digits is 53747712, while the sum is 63.

The spelling of 162438436989 in words is "one hundred sixty-two billion, four hundred thirty-eight million, four hundred thirty-six thousand, nine hundred eighty-nine".