161895672 has 80 divisors (see below), whose sum is σ = 455855400. Its totient is φ = 53680320.

The previous prime is 161895667. The next prime is 161895703. The reversal of 161895672 is 276598161.

161895672 is a `hidden beast` number, since 1 + 6 + 1 + 89 + 567 + 2 = 666.

161895672 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161895672² = 52420417224663168, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 147847 + ... + 148937.

Almost surely, 2^161895672 is an apocalyptic number.

161895672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161895672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (227927700).

161895672 is an abundant number, since it is smaller than the sum of its proper divisors (293959728).

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

161895672 is a wasteful number, since it uses less digits than its factorization.

161895672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1338 (or 1325 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 161895672 is about 12723.8230104006. The cubic root of 161895672 is about 545.0191301536.

The spelling of 161895672 in words is "one hundred sixty-one million, eight hundred ninety-five thousand, six hundred seventy-two".