161330164 has 6 divisors (see below), whose sum is σ = 282327794. Its totient is φ = 80665080.

The previous prime is 161330149. The next prime is 161330173. The reversal of 161330164 is 461033161.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 104448400 + 56881764 = 10220^2 + 7542^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20166267 + ... + 20166274.

Almost surely, 2^161330164 is an apocalyptic number.

It is an amenable number.

161330164 is a deficient number, since it is larger than the sum of its proper divisors (120997630).

161330164 is a wasteful number, since it uses less digits than its factorization.

161330164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40332545 (or 40332543 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 161330164 is about 12701.5811614145. The cubic root of 161330164 is about 544.3837986902.

The spelling of 161330164 in words is "one hundred sixty-one million, three hundred thirty thousand, one hundred sixty-four".