161404616 has 16 divisors (see below), whose sum is σ = 315792000. Its totient is φ = 77193424.

The previous prime is 161404583. The next prime is 161404637. The reversal of 161404616 is 616404161.

161404616 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161404616² = 52102900132214912, 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, 438416 + ... + 438783.

It is an arithmetic number, because the mean of its divisors is an integer number (19737000).

Almost surely, 2^161404616 is an apocalyptic number.

It is an amenable number.

161404616 is a deficient number, since it is larger than the sum of its proper divisors (154387384).

161404616 is a wasteful number, since it uses less digits than its factorization.

161404616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 877228 (or 877224 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 161404616 is about 12704.5116395712. The cubic root of 161404616 is about 544.4675280817.

Adding to 161404616 its reverse (616404161), we get a palindrome (777808777).

The spelling of 161404616 in words is "one hundred sixty-one million, four hundred four thousand, six hundred sixteen".