161543546 has 8 divisors (see below), whose sum is σ = 243545940. Its totient is φ = 80361568.

The previous prime is 161543539. The next prime is 161543581. The reversal of 161543546 is 645345161.

It can be written as a sum of positive squares in 2 ways, for example, as 121992025 + 39551521 = 11045^2 + 6289^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 204611 + ... + 205398.

Almost surely, 2^161543546 is an apocalyptic number.

161543546 is a deficient number, since it is larger than the sum of its proper divisors (82002394).

161543546 is a wasteful number, since it uses less digits than its factorization.

161543546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410208.

The product of its digits is 43200, while the sum is 35.

The square root of 161543546 is about 12709.9782061182. The cubic root of 161543546 is about 544.6237011879.

The spelling of 161543546 in words is "one hundred sixty-one million, five hundred forty-three thousand, five hundred forty-six".