163644055 has 16 divisors (see below), whose sum is σ = 207623520. Its totient is φ = 123475968.

The previous prime is 163644043. The next prime is 163644067. The reversal of 163644055 is 550446361.

It is an interprime number because it is at equal distance from previous prime (163644043) and next prime (163644067).

It is a cyclic number.

It is not a de Polignac number, because 163644055 - 2⁷ = 163643927 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 163644055.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 18439 + ... + 25831.

It is an arithmetic number, because the mean of its divisors is an integer number (12976470).

Almost surely, 2^163644055 is an apocalyptic number.

163644055 is a deficient number, since it is larger than the sum of its proper divisors (43979465).

163644055 is a wasteful number, since it uses less digits than its factorization.

163644055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7650.

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 163644055 is about 12792.3436085809. The cubic root of 163644055 is about 546.9740770913.

The spelling of 163644055 in words is "one hundred sixty-three million, six hundred forty-four thousand, fifty-five".