161745908 has 12 divisors (see below), whose sum is σ = 285701472. Its totient is φ = 80116920.

The previous prime is 161745889. The next prime is 161745911. The reversal of 161745908 is 809547161.

It is a congruent number.

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 in 3 ways as a sum of consecutive naturals, for example, 188528 + ... + 189383.

It is an arithmetic number, because the mean of its divisors is an integer number (23808456).

Almost surely, 2^161745908 is an apocalyptic number.

It is an amenable number.

161745908 is a deficient number, since it is larger than the sum of its proper divisors (123955564).

161745908 is a wasteful number, since it uses less digits than its factorization.

161745908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378022 (or 378020 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 161745908 is about 12717.9364678394. The cubic root of 161745908 is about 544.8510189534.

The spelling of 161745908 in words is "one hundred sixty-one million, seven hundred forty-five thousand, nine hundred eight".