163641105 has 12 divisors (see below), whose sum is σ = 283644660. Its totient is φ = 87275232.

The previous prime is 163641097. The next prime is 163641119. The reversal of 163641105 is 501146361.

163641105 is a `hidden beast` number, since 1 + 6 + 3 + 641 + 10 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 51365889 + 112275216 = 7167^2 + 10596^2 .

It is not a de Polignac number, because 163641105 - 2³ = 163641097 is a prime.

It is a super-2 number, since 2×163641105² = 53556822491242050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1818190 + ... + 1818279.

It is an arithmetic number, because the mean of its divisors is an integer number (23637055).

Almost surely, 2^163641105 is an apocalyptic number.

163641105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

163641105 is a deficient number, since it is larger than the sum of its proper divisors (120003555).

163641105 is a wasteful number, since it uses less digits than its factorization.

163641105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3636480 (or 3636477 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 163641105 is about 12792.2283047169. The cubic root of 163641105 is about 546.9707903170.

Adding to 163641105 its reverse (501146361), we get a palindrome (664787466).

The spelling of 163641105 in words is "one hundred sixty-three million, six hundred forty-one thousand, one hundred five".