161353472 has 108 divisors (see below), whose sum is σ = 394962120. Its totient is φ = 65415168.

The previous prime is 161353427. The next prime is 161353499. The reversal of 161353472 is 274353161.

It is a Harshad number since it is a multiple of its sum of digits (32).

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 11 ways as a sum of consecutive naturals, for example, 237998 + ... + 238674.

Almost surely, 2^161353472 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 161353472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (197481060).

161353472 is an abundant number, since it is smaller than the sum of its proper divisors (233608648).

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

161353472 is an equidigital number, since it uses as much as digits as its factorization.

161353472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726 (or 705 counting only the distinct ones).

The product of its digits is 15120, while the sum is 32.

The square root of 161353472 is about 12702.4986518401. The cubic root of 161353472 is about 544.4100138468.

The spelling of 161353472 in words is "one hundred sixty-one million, three hundred fifty-three thousand, four hundred seventy-two".