161752320 has 216 divisors, whose sum is σ = 589898400. Its totient is φ = 40808448.

The previous prime is 161752313. The next prime is 161752321. The reversal of 161752320 is 23257161.

It is a happy number.

161752320 is a `hidden beast` number, since 1 + 617 + 5 + 23 + 20 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161752321) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 218511 + ... + 219249.

Almost surely, 2^161752320 is an apocalyptic number.

161752320 is a gapful number since it is divisible by the number (10) 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 161752320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (294949200).

161752320 is an abundant number, since it is smaller than the sum of its proper divisors (428146080).

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

161752320 is a wasteful number, since it uses less digits than its factorization.

161752320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 785 (or 768 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 161752320 is about 12718.1885502614. The cubic root of 161752320 is about 544.8582185968.

The spelling of 161752320 in words is "one hundred sixty-one million, seven hundred fifty-two thousand, three hundred twenty".