161735648 has 48 divisors (see below), whose sum is σ = 331490880. Its totient is φ = 77615616.

The previous prime is 161735641. The next prime is 161735653. The reversal of 161735648 is 846537161.

161735648 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161735641) 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, 78698 + ... + 80726.

It is an arithmetic number, because the mean of its divisors is an integer number (6906060).

Almost surely, 2^161735648 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 161735648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (165745440).

161735648 is an abundant number, since it is smaller than the sum of its proper divisors (169755232).

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

161735648 is a wasteful number, since it uses less digits than its factorization.

161735648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2139 (or 2131 counting only the distinct ones).

The product of its digits is 120960, while the sum is 41.

The square root of 161735648 is about 12717.5330941185. The cubic root of 161735648 is about 544.8394982299.

The spelling of 161735648 in words is "one hundred sixty-one million, seven hundred thirty-five thousand, six hundred forty-eight".