163351643 has 24 divisors (see below), whose sum is σ = 206745840. Its totient is φ = 127915200.

The previous prime is 163351637. The next prime is 163351663. The reversal of 163351643 is 346153361.

It is not a de Polignac number, because 163351643 - 2²⁰ = 162303067 is a prime.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (163351663) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 63068 + ... + 65606.

It is an arithmetic number, because the mean of its divisors is an integer number (8614410).

Almost surely, 2^163351643 is an apocalyptic number.

163351643 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

163351643 is a deficient number, since it is larger than the sum of its proper divisors (43394197).

163351643 is a wasteful number, since it uses less digits than its factorization.

163351643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2667 (or 2660 counting only the distinct ones).

The product of its digits is 19440, while the sum is 32.

The square root of 163351643 is about 12780.9093181980. The cubic root of 163351643 is about 546.6480908239.

The spelling of 163351643 in words is "one hundred sixty-three million, three hundred fifty-one thousand, six hundred forty-three".