161081706 has 8 divisors (see below), whose sum is σ = 322163424. Its totient is φ = 53693900.

The previous prime is 161081699. The next prime is 161081707. The reversal of 161081706 is 607180161.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

161081706 is an admirable number.

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 in 3 ways as a sum of consecutive naturals, for example, 13423470 + ... + 13423481.

It is an arithmetic number, because the mean of its divisors is an integer number (40270428).

Almost surely, 2^161081706 is an apocalyptic number.

161081706 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161081706 is a wasteful number, since it uses less digits than its factorization.

161081706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26846956.

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 161081706 is about 12691.7967995079. The cubic root of 161081706 is about 544.1041940163.

The spelling of 161081706 in words is "one hundred sixty-one million, eighty-one thousand, seven hundred six".