163609216 has 16 divisors (see below), whose sum is σ = 325940490. Its totient is φ = 81804544.

The previous prime is 163609163. The next prime is 163609231. The reversal of 163609216 is 612906361.

It can be written as a sum of positive squares in only one way, i.e., 136983616 + 26625600 = 11704^2 + 5160^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 638971 + ... + 639226.

Almost surely, 2^163609216 is an apocalyptic number.

163609216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

163609216 is a deficient number, since it is larger than the sum of its proper divisors (162331274).

163609216 is an equidigital number, since it uses as much as digits as its factorization.

163609216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1278211 (or 1278199 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 163609216 is about 12790.9818231440. The cubic root of 163609216 is about 546.9352583223.

The spelling of 163609216 in words is "one hundred sixty-three million, six hundred nine thousand, two hundred sixteen".