161071684 has 18 divisors (see below), whose sum is σ = 291936554. Its totient is φ = 77757120.

The previous prime is 161071663. The next prime is 161071697. The reversal of 161071684 is 486170161.

It can be written as a sum of positive squares in 3 ways, for example, as 58859584 + 102212100 = 7672^2 + 10110^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20577 + ... + 27304.

Almost surely, 2^161071684 is an apocalyptic number.

It is an amenable number.

161071684 is a deficient number, since it is larger than the sum of its proper divisors (130864870).

161071684 is a wasteful number, since it uses less digits than its factorization.

161071684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47943 (or 47912 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 161071684 is about 12691.4019714136. The cubic root of 161071684 is about 544.0929096285.

The spelling of 161071684 in words is "one hundred sixty-one million, seventy-one thousand, six hundred eighty-four".