161985119424 has 56 divisors (see below), whose sum is σ = 436672177200. Its totient is φ = 52976262144.

The previous prime is 161985119407. The next prime is 161985119449. The reversal of 161985119424 is 424911589161.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7948999 + ... + 7969350.

It is an arithmetic number, because the mean of its divisors is an integer number (7797717450).

Almost surely, 2^161985119424 is an apocalyptic number.

It is an amenable number.

161985119424 is an abundant number, since it is smaller than the sum of its proper divisors (274687057776).

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

161985119424 is a wasteful number, since it uses less digits than its factorization.

161985119424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15918417 (or 15918407 counting only the distinct ones).

The product of its digits is 622080, while the sum is 51.

The spelling of 161985119424 in words is "one hundred sixty-one billion, nine hundred eighty-five million, one hundred nineteen thousand, four hundred twenty-four".