161132544 has 208 divisors, whose sum is σ = 503255040. Its totient is φ = 50872320.

The previous prime is 161132539. The next prime is 161132551. The reversal of 161132544 is 445231161.

It is a happy number.

161132544 is a `hidden beast` number, since 1 + 6 + 113 + 2 + 544 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3428329 + ... + 3428375.

Almost surely, 2^161132544 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 161132544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (251627520).

161132544 is an abundant number, since it is smaller than the sum of its proper divisors (342122496).

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

161132544 is an equidigital number, since it uses as much as digits as its factorization.

161132544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111 (or 83 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 161132544 is about 12693.7994312184. The cubic root of 161132544 is about 544.1614284477.

The spelling of 161132544 in words is "one hundred sixty-one million, one hundred thirty-two thousand, five hundred forty-four".