161325436 has 6 divisors (see below), whose sum is σ = 282319520. Its totient is φ = 80662716.

The previous prime is 161325431. The next prime is 161325443. The reversal of 161325436 is 634523161.

It is a junction number, because it is equal to n+sod(n) for n = 161325398 and 161325407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161325431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20165676 + ... + 20165683.

Almost surely, 2^161325436 is an apocalyptic number.

It is an amenable number.

161325436 is a deficient number, since it is larger than the sum of its proper divisors (120994084).

161325436 is a wasteful number, since it uses less digits than its factorization.

161325436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40331363 (or 40331361 counting only the distinct ones).

The product of its digits is 12960, while the sum is 31.

The square root of 161325436 is about 12701.3950414905. The cubic root of 161325436 is about 544.3784806689.

Adding to 161325436 its reverse (634523161), we get a palindrome (795848597).

The spelling of 161325436 in words is "one hundred sixty-one million, three hundred twenty-five thousand, four hundred thirty-six".