161215984 has 10 divisors (see below), whose sum is σ = 312356000. Its totient is φ = 80607984.

The previous prime is 161215973. The next prime is 161215991. The reversal of 161215984 is 489512161.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5037984 + ... + 5038015.

It is an arithmetic number, because the mean of its divisors is an integer number (31235600).

Almost surely, 2^161215984 is an apocalyptic number.

It is an amenable number.

161215984 is a deficient number, since it is larger than the sum of its proper divisors (151140016).

161215984 is a wasteful number, since it uses less digits than its factorization.

161215984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10076007 (or 10076001 counting only the distinct ones).

The product of its digits is 17280, while the sum is 37.

The square root of 161215984 is about 12697.0856498647. The cubic root of 161215984 is about 544.2553407705.

The spelling of 161215984 in words is "one hundred sixty-one million, two hundred fifteen thousand, nine hundred eighty-four".