161328574 has 12 divisors (see below), whose sum is σ = 265992552. Its totient is φ = 73331060.

The previous prime is 161328571. The next prime is 161328577. The reversal of 161328574 is 475823161.

It is an interprime number because it is at equal distance from previous prime (161328571) and next prime (161328577).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161328571) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 333082 + ... + 333565.

It is an arithmetic number, because the mean of its divisors is an integer number (22166046).

Almost surely, 2^161328574 is an apocalyptic number.

161328574 is a deficient number, since it is larger than the sum of its proper divisors (104663978).

161328574 is a wasteful number, since it uses less digits than its factorization.

161328574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666671 (or 666660 counting only the distinct ones).

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

The square root of 161328574 is about 12701.5185706277. The cubic root of 161328574 is about 544.3820102809.

The spelling of 161328574 in words is "one hundred sixty-one million, three hundred twenty-eight thousand, five hundred seventy-four".