161749248 has 72 divisors (see below), whose sum is σ = 449254848. Its totient is φ = 51566592.

The previous prime is 161749219. The next prime is 161749249. The reversal of 161749248 is 842947161.

It is not an unprimeable number, because it can be changed into a prime (161749249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13086 + ... + 22242.

Almost surely, 2^161749248 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 161749248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (224627424).

161749248 is an abundant number, since it is smaller than the sum of its proper divisors (287505600).

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

161749248 is an equidigital number, since it uses as much as digits as its factorization.

161749248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9199 (or 9185 counting only the distinct ones).

The product of its digits is 96768, while the sum is 42.

The square root of 161749248 is about 12718.0677777719. The cubic root of 161749248 is about 544.8547692593.

The spelling of 161749248 in words is "one hundred sixty-one million, seven hundred forty-nine thousand, two hundred forty-eight".