161843476 has 12 divisors (see below), whose sum is σ = 290881108. Its totient is φ = 78734592.

The previous prime is 161843471. The next prime is 161843491. The reversal of 161843476 is 674348161.

It can be written as a sum of positive squares in 2 ways, for example, as 65999376 + 95844100 = 8124^2 + 9790^2 .

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161843471) by changing a digit.

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, 546621 + ... + 546916.

Almost surely, 2^161843476 is an apocalyptic number.

It is an amenable number.

161843476 is a deficient number, since it is larger than the sum of its proper divisors (129037632).

161843476 is a wasteful number, since it uses less digits than its factorization.

161843476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1093578 (or 1093576 counting only the distinct ones).

The product of its digits is 96768, while the sum is 40.

The square root of 161843476 is about 12721.7717319562. The cubic root of 161843476 is about 544.9605515312.

The spelling of 161843476 in words is "one hundred sixty-one million, eight hundred forty-three thousand, four hundred seventy-six".