161481648 has 40 divisors (see below), whose sum is σ = 417830400. Its totient is φ = 53740864.

The previous prime is 161481637. The next prime is 161481679. The reversal of 161481648 is 846184161.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32173 + ... + 36851.

It is an arithmetic number, because the mean of its divisors is an integer number (10445760).

Almost surely, 2^161481648 is an apocalyptic number.

It is an amenable number.

161481648 is an abundant number, since it is smaller than the sum of its proper divisors (256348752).

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

161481648 is a wasteful number, since it uses less digits than its factorization.

161481648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5409 (or 5403 counting only the distinct ones).

The product of its digits is 36864, while the sum is 39.

The square root of 161481648 is about 12707.5429568426. The cubic root of 161481648 is about 544.5541318669.

The spelling of 161481648 in words is "one hundred sixty-one million, four hundred eighty-one thousand, six hundred forty-eight".