161324578 has 8 divisors (see below), whose sum is σ = 244207260. Its totient is φ = 79922160.

The previous prime is 161324561. The next prime is 161324591. The reversal of 161324578 is 875423161.

161324578 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 149744169 + 11580409 = 12237^2 + 3403^2 .

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, 369793 + ... + 370228.

Almost surely, 2^161324578 is an apocalyptic number.

161324578 is a deficient number, since it is larger than the sum of its proper divisors (82882682).

161324578 is a wasteful number, since it uses less digits than its factorization.

161324578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740132.

The product of its digits is 40320, while the sum is 37.

The square root of 161324578 is about 12701.3612656282. The cubic root of 161324578 is about 544.3775155853.

The spelling of 161324578 in words is "one hundred sixty-one million, three hundred twenty-four thousand, five hundred seventy-eight".