161144543 has 8 divisors (see below), whose sum is σ = 185402400. Its totient is φ = 137196000.

The previous prime is 161144537. The next prime is 161144549. The reversal of 161144543 is 345441161.

It is an interprime number because it is at equal distance from previous prime (161144537) and next prime (161144549).

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

It is a cyclic number.

It is not a de Polignac number, because 161144543 - 2⁴ = 161144527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161144549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76208 + ... + 78293.

It is an arithmetic number, because the mean of its divisors is an integer number (23175300).

Almost surely, 2^161144543 is an apocalyptic number.

161144543 is a deficient number, since it is larger than the sum of its proper divisors (24257857).

161144543 is a wasteful number, since it uses less digits than its factorization.

161144543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154657.

The product of its digits is 5760, while the sum is 29.

The square root of 161144543 is about 12694.2720547497. The cubic root of 161144543 is about 544.1749354044.

The spelling of 161144543 in words is "one hundred sixty-one million, one hundred forty-four thousand, five hundred forty-three".