161040444 has 12 divisors (see below), whose sum is σ = 375761064. Its totient is φ = 53680144.

The previous prime is 161040431. The next prime is 161040449. The reversal of 161040444 is 444040161.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161040449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6710007 + ... + 6710030.

It is an arithmetic number, because the mean of its divisors is an integer number (31313422).

Almost surely, 2^161040444 is an apocalyptic number.

It is an amenable number.

161040444 is an abundant number, since it is smaller than the sum of its proper divisors (214720620).

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

161040444 is a wasteful number, since it uses less digits than its factorization.

161040444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13420044 (or 13420042 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 161040444 is about 12690.1711572382. The cubic root of 161040444 is about 544.0577315821.

The spelling of 161040444 in words is "one hundred sixty-one million, forty thousand, four hundred forty-four".