161118508688 has 20 divisors (see below), whose sum is σ = 322237018368. Its totient is φ = 77960568480.

The previous prime is 161118508637. The next prime is 161118508697. The reversal of 161118508688 is 886805811161.

161118508688 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 162417356 + ... + 162418347.

Almost surely, 2^161118508688 is an apocalyptic number.

It is an amenable number.

161118508688 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

161118508688 is a wasteful number, since it uses less digits than its factorization.

161118508688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324835742 (or 324835736 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 53.

The spelling of 161118508688 in words is "one hundred sixty-one billion, one hundred eighteen million, five hundred eight thousand, six hundred eighty-eight".