163216643 has 16 divisors (see below), whose sum is σ = 179138304. Its totient is φ = 148039680.

The previous prime is 163216639. The next prime is 163216661. The reversal of 163216643 is 346612361.

It is a cyclic number.

It is not a de Polignac number, because 163216643 - 2² = 163216639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163216673) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 166571 + ... + 167547.

It is an arithmetic number, because the mean of its divisors is an integer number (11196144).

Almost surely, 2^163216643 is an apocalyptic number.

163216643 is a deficient number, since it is larger than the sum of its proper divisors (15921661).

163216643 is a wasteful number, since it uses less digits than its factorization.

163216643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1342.

The product of its digits is 15552, while the sum is 32.

The square root of 163216643 is about 12775.6269122106. The cubic root of 163216643 is about 546.4974590745.

The spelling of 163216643 in words is "one hundred sixty-three million, two hundred sixteen thousand, six hundred forty-three".