161340804 has 81 divisors (see below), whose sum is σ = 428247183. Its totient is φ = 51214464.

The previous prime is 161340797. The next prime is 161340811. The reversal of 161340804 is 408043161.

The square root of 161340804 is 12702.

It is a perfect power (a square), and thus also a powerful number.

161340804 is a `hidden beast` number, since 1 + 613 + 40 + 8 + 0 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (161340797) and next prime (161340811).

It can be written as a sum of positive squares in 4 ways, for example, as 1368900 + 159971904 = 1170^2 + 12648^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2210112 + ... + 2210184.

Almost surely, 2^161340804 is an apocalyptic number.

161340804 is the 12702-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161340804

161340804 is an abundant number, since it is smaller than the sum of its proper divisors (266906379).

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

161340804 is a wasteful number, since it uses less digits than its factorization.

161340804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214 (or 107 counting only the distinct ones).

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

The cubic root of 161340804 is about 544.3957661077.

Multiplying 161340804 by its product of nonzero digits (2304), we get a square (371729212416 = 609696²).

Adding to 161340804 its reverse (408043161), we get a palindrome (569383965).

The spelling of 161340804 in words is "one hundred sixty-one million, three hundred forty thousand, eight hundred four".