161143546 has 16 divisors (see below), whose sum is σ = 250698600. Its totient is φ = 77591808.

The previous prime is 161143523. The next prime is 161143553. The reversal of 161143546 is 645341161.

It can be written as a sum of positive squares in 4 ways, for example, as 140541025 + 20602521 = 11855^2 + 4539^2 .

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 in 7 ways as a sum of consecutive naturals, for example, 20326 + ... + 27118.

Almost surely, 2^161143546 is an apocalyptic number.

161143546 is a deficient number, since it is larger than the sum of its proper divisors (89555054).

161143546 is a wasteful number, since it uses less digits than its factorization.

161143546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7233.

The product of its digits is 8640, while the sum is 31.

The square root of 161143546 is about 12694.2327850091. The cubic root of 161143546 is about 544.1738131335.

The spelling of 161143546 in words is "one hundred sixty-one million, one hundred forty-three thousand, five hundred forty-six".