161173568 has 14 divisors (see below), whose sum is σ = 319828926. Its totient is φ = 80586752.

The previous prime is 161173543. The next prime is 161173577. The reversal of 161173568 is 865371161.

It can be written as a sum of positive squares in only one way, i.e., 85969984 + 75203584 = 9272^2 + 8672^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1259105 + ... + 1259232.

Almost surely, 2^161173568 is an apocalyptic number.

It is an amenable number.

161173568 is a deficient number, since it is larger than the sum of its proper divisors (158655358).

161173568 is an equidigital number, since it uses as much as digits as its factorization.

161173568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2518349 (or 2518339 counting only the distinct ones).

The product of its digits is 30240, while the sum is 38.

The square root of 161173568 is about 12695.4152354305. The cubic root of 161173568 is about 544.2076053065.

The spelling of 161173568 in words is "one hundred sixty-one million, one hundred seventy-three thousand, five hundred sixty-eight".