161225648 has 10 divisors (see below), whose sum is σ = 312374724. Its totient is φ = 80612816.

The previous prime is 161225633. The next prime is 161225657. The reversal of 161225648 is 846522161.

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 as a sum of consecutive naturals, namely, 5038286 + ... + 5038317.

Almost surely, 2^161225648 is an apocalyptic number.

It is an amenable number.

161225648 is a deficient number, since it is larger than the sum of its proper divisors (151149076).

161225648 is a wasteful number, since it uses less digits than its factorization.

161225648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10076611 (or 10076605 counting only the distinct ones).

The product of its digits is 23040, while the sum is 35.

The square root of 161225648 is about 12697.4662039322. The cubic root of 161225648 is about 544.2662155783.

The spelling of 161225648 in words is "one hundred sixty-one million, two hundred twenty-five thousand, six hundred forty-eight".