161735448 has 128 divisors (see below), whose sum is σ = 507801600. Its totient is φ = 41855616.

The previous prime is 161735437. The next prime is 161735479. The reversal of 161735448 is 844537161.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 72315 + ... + 74517.

It is an arithmetic number, because the mean of its divisors is an integer number (3967200).

Almost surely, 2^161735448 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 161735448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (253900800).

161735448 is an abundant number, since it is smaller than the sum of its proper divisors (346066152).

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

161735448 is a wasteful number, since it uses less digits than its factorization.

161735448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2261 (or 2257 counting only the distinct ones).

The product of its digits is 80640, while the sum is 39.

The square root of 161735448 is about 12717.5252309559. The cubic root of 161735448 is about 544.8392736495.

The spelling of 161735448 in words is "one hundred sixty-one million, seven hundred thirty-five thousand, four hundred forty-eight".