161436544 has 16 divisors (see below), whose sum is σ = 321612120. Its totient is φ = 80718208.

The previous prime is 161436529. The next prime is 161436547. The reversal of 161436544 is 445634161.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161436547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 630484 + ... + 630739.

Almost surely, 2^161436544 is an apocalyptic number.

It is an amenable number.

161436544 is a deficient number, since it is larger than the sum of its proper divisors (160175576).

161436544 is an equidigital number, since it uses as much as digits as its factorization.

161436544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1261237 (or 1261225 counting only the distinct ones).

The product of its digits is 34560, while the sum is 34.

The square root of 161436544 is about 12705.7681389202. The cubic root of 161436544 is about 544.5034267103.

The spelling of 161436544 in words is "one hundred sixty-one million, four hundred thirty-six thousand, five hundred forty-four".