161444264 has 8 divisors (see below), whose sum is σ = 302708010. Its totient is φ = 80722128.

The previous prime is 161444251. The next prime is 161444267. The reversal of 161444264 is 462444161.

It can be written as a sum of positive squares in only one way, i.e., 135536164 + 25908100 = 11642^2 + 5090^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 161444264.

It is not an unprimeable number, because it can be changed into a prime (161444267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10090259 + ... + 10090274.

Almost surely, 2^161444264 is an apocalyptic number.

It is an amenable number.

161444264 is a deficient number, since it is larger than the sum of its proper divisors (141263746).

161444264 is a wasteful number, since it uses less digits than its factorization.

161444264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20180539 (or 20180535 counting only the distinct ones).

The product of its digits is 18432, while the sum is 32.

The square root of 161444264 is about 12706.0719343155. The cubic root of 161444264 is about 544.5121060741.

The spelling of 161444264 in words is "one hundred sixty-one million, four hundred forty-four thousand, two hundred sixty-four".