161268444 has 36 divisors (see below), whose sum is σ = 409224816. Its totient is φ = 53548608.

The previous prime is 161268413. The next prime is 161268463. The reversal of 161268444 is 444862161.

It is a happy number.

161268444 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×161268444² = 52015022060362272, which contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 161268399 and 161268408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 952 + ... + 17984.

It is an arithmetic number, because the mean of its divisors is an integer number (11367356).

Almost surely, 2^161268444 is an apocalyptic number.

It is an amenable number.

161268444 is an abundant number, since it is smaller than the sum of its proper divisors (247956372).

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

161268444 is a wasteful number, since it uses less digits than its factorization.

161268444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17306 (or 17301 counting only the distinct ones).

The product of its digits is 36864, while the sum is 36.

The square root of 161268444 is about 12699.1513102254. The cubic root of 161268444 is about 544.3143682897.

The spelling of 161268444 in words is "one hundred sixty-one million, two hundred sixty-eight thousand, four hundred forty-four".