161980032 has 64 divisors (see below), whose sum is σ = 433540800. Its totient is φ = 53581824.

The previous prime is 161980019. The next prime is 161980037. The reversal of 161980032 is 230089161.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (161980037) by changing a digit.

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, 51069 + ... + 54147.

It is an arithmetic number, because the mean of its divisors is an integer number (6774075).

Almost surely, 2^161980032 is an apocalyptic number.

161980032 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161980032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (216770400).

161980032 is an abundant number, since it is smaller than the sum of its proper divisors (271560768).

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

161980032 is a wasteful number, since it uses less digits than its factorization.

161980032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3233 (or 3221 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 161980032 is about 12727.1376200621. The cubic root of 161980032 is about 545.1137792355.

The spelling of 161980032 in words is "one hundred sixty-one million, nine hundred eighty thousand, thirty-two".