161869672 has 32 divisors (see below), whose sum is σ = 312642720. Its totient is φ = 78511680.

The previous prime is 161869637. The next prime is 161869703. The reversal of 161869672 is 276968161.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137647 + ... + 138817.

It is an arithmetic number, because the mean of its divisors is an integer number (9770085).

Almost surely, 2^161869672 is an apocalyptic number.

It is an amenable number.

161869672 is a deficient number, since it is larger than the sum of its proper divisors (150773048).

161869672 is a wasteful number, since it uses less digits than its factorization.

161869672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1681 (or 1677 counting only the distinct ones).

The product of its digits is 217728, while the sum is 46.

The square root of 161869672 is about 12722.8012638727. The cubic root of 161869672 is about 544.9899524001.

The spelling of 161869672 in words is "one hundred sixty-one million, eight hundred sixty-nine thousand, six hundred seventy-two".