161065868 has 6 divisors (see below), whose sum is σ = 281865276. Its totient is φ = 80532932.

The previous prime is 161065859. The next prime is 161065873. The reversal of 161065868 is 868560161.

It is a happy number.

161065868 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20133230 + ... + 20133237.

It is an arithmetic number, because the mean of its divisors is an integer number (46977546).

Almost surely, 2^161065868 is an apocalyptic number.

It is an amenable number.

161065868 is a deficient number, since it is larger than the sum of its proper divisors (120799408).

161065868 is a wasteful number, since it uses less digits than its factorization.

161065868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40266471 (or 40266469 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 41.

The square root of 161065868 is about 12691.1728378428. The cubic root of 161065868 is about 544.0863608208.

The spelling of 161065868 in words is "one hundred sixty-one million, sixty-five thousand, eight hundred sixty-eight".