161982184368 has 80 divisors (see below), whose sum is σ = 425661148800. Its totient is φ = 53064599040.

The previous prime is 161982184339. The next prime is 161982184369. The reversal of 161982184368 is 863481289161.

It is not an unprimeable number, because it can be changed into a prime (161982184369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17584948 + ... + 17594156.

It is an arithmetic number, because the mean of its divisors is an integer number (5320764360).

Almost surely, 2^161982184368 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161982184368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (212830574400).

161982184368 is an abundant number, since it is smaller than the sum of its proper divisors (263678964432).

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

161982184368 is a wasteful number, since it uses less digits than its factorization.

161982184368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15490 (or 15484 counting only the distinct ones).

The product of its digits is 3981312, while the sum is 57.

The spelling of 161982184368 in words is "one hundred sixty-one billion, nine hundred eighty-two million, one hundred eighty-four thousand, three hundred sixty-eight".