161873456 has 20 divisors (see below), whose sum is σ = 332079192. Its totient is φ = 76175616.

The previous prime is 161873431. The next prime is 161873477. The reversal of 161873456 is 654378161.

161873456 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 297290 + ... + 297833.

Almost surely, 2^161873456 is an apocalyptic number.

161873456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

161873456 is an abundant number, since it is smaller than the sum of its proper divisors (170205736).

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

161873456 is a wasteful number, since it uses less digits than its factorization.

161873456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595148 (or 595142 counting only the distinct ones).

The product of its digits is 120960, while the sum is 41.

The square root of 161873456 is about 12722.9499723924. The cubic root of 161873456 is about 544.9941990797.

The spelling of 161873456 in words is "one hundred sixty-one million, eight hundred seventy-three thousand, four hundred fifty-six".