161612104 has 16 divisors (see below), whose sum is σ = 303160320. Its totient is φ = 80769360.

The previous prime is 161612093. The next prime is 161612111. The reversal of 161612104 is 401216161.

It is a super-2 number, since 2×161612104² = 52236944318613632, which contains 22 as substring.

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, 26617 + ... + 32119.

It is an arithmetic number, because the mean of its divisors is an integer number (18947520).

Almost surely, 2^161612104 is an apocalyptic number.

It is an amenable number.

161612104 is a deficient number, since it is larger than the sum of its proper divisors (141548216).

161612104 is a wasteful number, since it uses less digits than its factorization.

161612104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9180 (or 9176 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 161612104 is about 12712.6749348829. The cubic root of 161612104 is about 544.7007351762.

Adding to 161612104 its reverse (401216161), we get a palindrome (562828265).

The spelling of 161612104 in words is "one hundred sixty-one million, six hundred twelve thousand, one hundred four".