161704688 has 10 divisors (see below), whose sum is σ = 313302864. Its totient is φ = 80852336.

The previous prime is 161704681. The next prime is 161704691. The reversal of 161704688 is 886407161.

161704688 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161704688² = 52296812242354688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161704681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5053256 + ... + 5053287.

Almost surely, 2^161704688 is an apocalyptic number.

It is an amenable number.

161704688 is a deficient number, since it is larger than the sum of its proper divisors (151598176).

161704688 is a wasteful number, since it uses less digits than its factorization.

161704688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10106551 (or 10106545 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 41.

The square root of 161704688 is about 12716.3158186638. The cubic root of 161704688 is about 544.8047309878.

The spelling of 161704688 in words is "one hundred sixty-one million, seven hundred four thousand, six hundred eighty-eight".