163648641 has 8 divisors (see below), whose sum is σ = 234982720. Its totient is φ = 100706832.

The previous prime is 163648631. The next prime is 163648649. The reversal of 163648641 is 146846361.

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

It is not a de Polignac number, because 163648641 - 2¹⁴ = 163632257 is a prime.

It is a super-2 number, since 2×163648641² = 53561755402293762, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 4196119 = 163648641 / (1 + 6 + 3 + 6 + 4 + 8 + 6 + 4 + 1).

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 163648641.

It is not an unprimeable number, because it can be changed into a prime (163648649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2098021 + ... + 2098098.

It is an arithmetic number, because the mean of its divisors is an integer number (29372840).

Almost surely, 2^163648641 is an apocalyptic number.

It is an amenable number.

163648641 is a deficient number, since it is larger than the sum of its proper divisors (71334079).

163648641 is a wasteful number, since it uses less digits than its factorization.

163648641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4196135.

The product of its digits is 82944, while the sum is 39.

The square root of 163648641 is about 12792.5228551682. The cubic root of 163648641 is about 546.9791865542.

The spelling of 163648641 in words is "one hundred sixty-three million, six hundred forty-eight thousand, six hundred forty-one".