163440601 has 8 divisors (see below), whose sum is σ = 174588264. Its totient is φ = 152463360.

The previous prime is 163440583. The next prime is 163440617. The reversal of 163440601 is 106044361.

It can be written as a sum of positive squares in 4 ways, for example, as 42968025 + 120472576 = 6555^2 + 10976^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 163440601 - 2⁵ = 163440569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163440661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40620 + ... + 44461.

It is an arithmetic number, because the mean of its divisors is an integer number (21823533).

Almost surely, 2^163440601 is an apocalyptic number.

It is an amenable number.

163440601 is a deficient number, since it is larger than the sum of its proper divisors (11147663).

163440601 is a wasteful number, since it uses less digits than its factorization.

163440601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85211.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 163440601 is about 12784.3889568489. The cubic root of 163440601 is about 546.7473039800.

Adding to 163440601 its reverse (106044361), we get a palindrome (269484962).

The spelling of 163440601 in words is "one hundred sixty-three million, four hundred forty thousand, six hundred one".