161842768 has 10 divisors (see below), whose sum is σ = 313570394. Its totient is φ = 80921376.

The previous prime is 161842729. The next prime is 161842777. The reversal of 161842768 is 867248161.

It can be written as a sum of positive squares in only one way, i.e., 106667584 + 55175184 = 10328^2 + 7428^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5057571 + ... + 5057602.

Almost surely, 2^161842768 is an apocalyptic number.

It is an amenable number.

161842768 is a deficient number, since it is larger than the sum of its proper divisors (151727626).

161842768 is a wasteful number, since it uses less digits than its factorization.

161842768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10115181 (or 10115175 counting only the distinct ones).

The product of its digits is 129024, while the sum is 43.

The square root of 161842768 is about 12721.7439056129. The cubic root of 161842768 is about 544.9597568691.

The spelling of 161842768 in words is "one hundred sixty-one million, eight hundred forty-two thousand, seven hundred sixty-eight".