163656916 has 6 divisors (see below), whose sum is σ = 286399610. Its totient is φ = 81828456.

The previous prime is 163656907. The next prime is 163656989. The reversal of 163656916 is 619656361.

It can be written as a sum of positive squares in only one way, i.e., 158860816 + 4796100 = 12604^2 + 2190^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20457111 + ... + 20457118.

Almost surely, 2^163656916 is an apocalyptic number.

It is an amenable number.

163656916 is a deficient number, since it is larger than the sum of its proper divisors (122742694).

163656916 is a wasteful number, since it uses less digits than its factorization.

163656916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40914233 (or 40914231 counting only the distinct ones).

The product of its digits is 174960, while the sum is 43.

The square root of 163656916 is about 12792.8462822001. The cubic root of 163656916 is about 546.9884058517.

The spelling of 163656916 in words is "one hundred sixty-three million, six hundred fifty-six thousand, nine hundred sixteen".