161344874 has 8 divisors (see below), whose sum is σ = 244413828. Its totient is φ = 79873600.

The previous prime is 161344871. The next prime is 161344877. The reversal of 161344874 is 478443161.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (161344871) and next prime (161344877).

It can be written as a sum of positive squares in 2 ways, for example, as 154878025 + 6466849 = 12445^2 + 2543^2 .

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

It is not an unprimeable number, because it can be changed into a prime (161344871) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 399167 + ... + 399570.

Almost surely, 2^161344874 is an apocalyptic number.

161344874 is a deficient number, since it is larger than the sum of its proper divisors (83068954).

161344874 is a wasteful number, since it uses less digits than its factorization.

161344874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798840.

The product of its digits is 64512, while the sum is 38.

The square root of 161344874 is about 12702.1602099800. The cubic root of 161344874 is about 544.4003437307.

The spelling of 161344874 in words is "one hundred sixty-one million, three hundred forty-four thousand, eight hundred seventy-four".