161982688 has 48 divisors (see below), whose sum is σ = 376233984. Its totient is φ = 67178880.

The previous prime is 161982673. The next prime is 161982703. The reversal of 161982688 is 886289161.

It is an interprime number because it is at equal distance from previous prime (161982673) and next prime (161982703).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 4720 + ... + 18607.

It is an arithmetic number, because the mean of its divisors is an integer number (7838208).

Almost surely, 2^161982688 is an apocalyptic number.

It is an amenable number.

161982688 is an abundant number, since it is smaller than the sum of its proper divisors (214251296).

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

161982688 is a wasteful number, since it uses less digits than its factorization.

161982688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23375 (or 23367 counting only the distinct ones).

The product of its digits is 331776, while the sum is 49.

The square root of 161982688 is about 12727.2419635992. The cubic root of 161982688 is about 545.1167586445.

The spelling of 161982688 in words is "one hundred sixty-one million, nine hundred eighty-two thousand, six hundred eighty-eight".