161871676 has 6 divisors (see below), whose sum is σ = 283275440. Its totient is φ = 80935836.

The previous prime is 161871667. The next prime is 161871679. The reversal of 161871676 is 676178161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161871679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20233956 + ... + 20233963.

Almost surely, 2^161871676 is an apocalyptic number.

It is an amenable number.

161871676 is a deficient number, since it is larger than the sum of its proper divisors (121403764).

161871676 is a wasteful number, since it uses less digits than its factorization.

161871676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40467923 (or 40467921 counting only the distinct ones).

The product of its digits is 84672, while the sum is 43.

The square root of 161871676 is about 12722.8800198697. The cubic root of 161871676 is about 544.9922014427.

The spelling of 161871676 in words is "one hundred sixty-one million, eight hundred seventy-one thousand, six hundred seventy-six".