161041644 has 36 divisors (see below), whose sum is σ = 428504440. Its totient is φ = 50855040.

The previous prime is 161041627. The next prime is 161041667. The reversal of 161041644 is 446140161.

161041644 is a `hidden beast` number, since 1 + 6 + 10 + 4 + 1 + 644 = 666.

161041644 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 2×161041644² = 51868822204445472, which contains 22 as substring.

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, 117037 + ... + 118404.

Almost surely, 2^161041644 is an apocalyptic number.

It is an amenable number.

161041644 is an abundant number, since it is smaller than the sum of its proper divisors (267462796).

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

161041644 is a wasteful number, since it uses less digits than its factorization.

161041644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235470 (or 235465 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 161041644 is about 12690.2184378363. The cubic root of 161041644 is about 544.0590829355.

The spelling of 161041644 in words is "one hundred sixty-one million, forty-one thousand, six hundred forty-four".