161138608 has 10 divisors (see below), whose sum is σ = 312206084. Its totient is φ = 80569296.

The previous prime is 161138561. The next prime is 161138609. The reversal of 161138608 is 806831161.

161138608 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (161138609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5035566 + ... + 5035597.

Almost surely, 2^161138608 is an apocalyptic number.

It is an amenable number.

161138608 is a deficient number, since it is larger than the sum of its proper divisors (151067476).

161138608 is a wasteful number, since it uses less digits than its factorization.

161138608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10071171 (or 10071165 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 161138608 is about 12694.0382857466. The cubic root of 161138608 is about 544.1682546158.

Adding to 161138608 its reverse (806831161), we get a palindrome (967969769).

The spelling of 161138608 in words is "one hundred sixty-one million, one hundred thirty-eight thousand, six hundred eight".