161742844 has 24 divisors (see below), whose sum is σ = 286918128. Its totient is φ = 79772160.

The previous prime is 161742829. The next prime is 161742851. The reversal of 161742844 is 448247161.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 171414 + ... + 172354.

It is an arithmetic number, because the mean of its divisors is an integer number (11954922).

Almost surely, 2^161742844 is an apocalyptic number.

It is an amenable number.

161742844 is a deficient number, since it is larger than the sum of its proper divisors (125175284).

161742844 is a wasteful number, since it uses less digits than its factorization.

161742844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1485 (or 1483 counting only the distinct ones).

The product of its digits is 43008, while the sum is 37.

The square root of 161742844 is about 12717.8160074755. The cubic root of 161742844 is about 544.8475785077.

The spelling of 161742844 in words is "one hundred sixty-one million, seven hundred forty-two thousand, eight hundred forty-four".