161189376 has 80 divisors (see below), whose sum is σ = 454752144. Its totient is φ = 50561024.

The previous prime is 161189351. The next prime is 161189411. The reversal of 161189376 is 673981161.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23026 + ... + 29198.

Almost surely, 2^161189376 is an apocalyptic number.

161189376 is a gapful number since it is divisible by the number (16) 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 161189376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (227376072).

161189376 is an abundant number, since it is smaller than the sum of its proper divisors (293562768).

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

161189376 is an equidigital number, since it uses as much as digits as its factorization.

161189376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6211 (or 6195 counting only the distinct ones).

The product of its digits is 54432, while the sum is 42.

The square root of 161189376 is about 12696.0378071271. The cubic root of 161189376 is about 544.2253967940.

The spelling of 161189376 in words is "one hundred sixty-one million, one hundred eighty-nine thousand, three hundred seventy-six".