161169436 has 12 divisors (see below), whose sum is σ = 282240112. Its totient is φ = 80529408.

The previous prime is 161169427. The next prime is 161169451. The reversal of 161169436 is 634961161.

It is a junction number, because it is equal to n+sod(n) for n = 161169395 and 161169404.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6885 + ... + 19228.

Almost surely, 2^161169436 is an apocalyptic number.

It is an amenable number.

161169436 is a deficient number, since it is larger than the sum of its proper divisors (121070676).

161169436 is a wasteful number, since it uses less digits than its factorization.

161169436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27660 (or 27658 counting only the distinct ones).

The product of its digits is 23328, while the sum is 37.

The square root of 161169436 is about 12695.2524984736. The cubic root of 161169436 is about 544.2029546575.

It can be divided in two parts, 16116 and 9436, that added together give a palindrome (25552).

The spelling of 161169436 in words is "one hundred sixty-one million, one hundred sixty-nine thousand, four hundred thirty-six".