161712119808 has 126 divisors (see below), whose sum is σ = 467455467297. Its totient is φ = 53867642880.

The previous prime is 161712119801. The next prime is 161712119827. The reversal of 161712119808 is 808911217161.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

161712119808 is a `hidden beast` number, since 1 + 617 + 1 + 21 + 1 + 9 + 8 + 0 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 160871583744 + 840536064 = 401088^2 + 28992^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=284352.

It is not an unprimeable number, because it can be changed into a prime (161712119801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 109190428 + ... + 109191908.

Almost surely, 2^161712119808 is an apocalyptic number.

161712119808 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161712119808

161712119808 is an abundant number, since it is smaller than the sum of its proper divisors (305743347489).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161712119808 is an frugal number, since it uses more digits than its factorization.

161712119808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2994 (or 1486 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 45.

The spelling of 161712119808 in words is "one hundred sixty-one billion, seven hundred twelve million, one hundred nineteen thousand, eight hundred eight".