161616236 has 12 divisors (see below), whose sum is σ = 284409720. Its totient is φ = 80356320.

The previous prime is 161616211. The next prime is 161616269. The reversal of 161616236 is 632616161.

It is a super-2 number, since 2×161616236² = 52239615477615392, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112145 + ... + 113576.

It is an arithmetic number, because the mean of its divisors is an integer number (23700810).

Almost surely, 2^161616236 is an apocalyptic number.

It is an amenable number.

161616236 is a deficient number, since it is larger than the sum of its proper divisors (122793484).

161616236 is a wasteful number, since it uses less digits than its factorization.

161616236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225904 (or 225902 counting only the distinct ones).

The product of its digits is 7776, while the sum is 32.

The square root of 161616236 is about 12712.8374488153. The cubic root of 161616236 is about 544.7053773290.

The spelling of 161616236 in words is "one hundred sixty-one million, six hundred sixteen thousand, two hundred thirty-six".