163655841 has 4 divisors (see below), whose sum is σ = 218207792. Its totient is φ = 109103892.

The previous prime is 163655839. The next prime is 163655861. The reversal of 163655841 is 148556361.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 163655841 - 2¹ = 163655839 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 163655841.

It is not an unprimeable number, because it can be changed into a prime (163655861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27275971 + ... + 27275976.

It is an arithmetic number, because the mean of its divisors is an integer number (54551948).

Almost surely, 2^163655841 is an apocalyptic number.

It is an amenable number.

163655841 is a deficient number, since it is larger than the sum of its proper divisors (54551951).

163655841 is an equidigital number, since it uses as much as digits as its factorization.

163655841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54551950.

The product of its digits is 86400, while the sum is 39.

The square root of 163655841 is about 12792.8042664617. The cubic root of 163655841 is about 546.9872081961.

The spelling of 163655841 in words is "one hundred sixty-three million, six hundred fifty-five thousand, eight hundred forty-one".