161234856 has 24 divisors (see below), whose sum is σ = 436677930. Its totient is φ = 53744928.

The previous prime is 161234849. The next prime is 161234891. The reversal of 161234856 is 658432161.

It is a happy number.

161234856 is a `hidden beast` number, since 1 + 612 + 34 + 8 + 5 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 118069956 + 43164900 = 10866^2 + 6570^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 161234856.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1119615 + ... + 1119758.

Almost surely, 2^161234856 is an apocalyptic number.

It is an amenable number.

161234856 is an abundant number, since it is smaller than the sum of its proper divisors (275443074).

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

161234856 is a wasteful number, since it uses less digits than its factorization.

161234856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2239385 (or 2239378 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 161234856 is about 12697.8287907815. The cubic root of 161234856 is about 544.2765768493.

The spelling of 161234856 in words is "one hundred sixty-one million, two hundred thirty-four thousand, eight hundred fifty-six".