161081708 has 6 divisors (see below), whose sum is σ = 281892996. Its totient is φ = 80540852.

The previous prime is 161081707. The next prime is 161081729. The reversal of 161081708 is 807180161.

It is not an unprimeable number, because it can be changed into a prime (161081707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20135210 + ... + 20135217.

It is an arithmetic number, because the mean of its divisors is an integer number (46982166).

Almost surely, 2^161081708 is an apocalyptic number.

It is an amenable number.

161081708 is a deficient number, since it is larger than the sum of its proper divisors (120811288).

161081708 is a wasteful number, since it uses less digits than its factorization.

161081708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40270431 (or 40270429 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 32.

The square root of 161081708 is about 12691.7968782990. The cubic root of 161081708 is about 544.1041962682.

The spelling of 161081708 in words is "one hundred sixty-one million, eighty-one thousand, seven hundred eight".