163440153324221 has 4 divisors (see below), whose sum is σ = 163441235494944. Its totient is φ = 163439071153500.

The previous prime is 163440153324163. The next prime is 163440153324247. The reversal of 163440153324221 is 122423351044361.

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 a cyclic number.

It is not a de Polignac number, because 163440153324221 - 2¹⁰ = 163440153323197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163440153324281) 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, 540858785 + ... + 541160886.

It is an arithmetic number, because the mean of its divisors is an integer number (40860308873736).

Almost surely, 2^{163440153324221} is an apocalyptic number.

It is an amenable number.

163440153324221 is a deficient number, since it is larger than the sum of its proper divisors (1082170723).

163440153324221 is a wasteful number, since it uses less digits than its factorization.

163440153324221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1082170722.

The product of its (nonzero) digits is 414720, while the sum is 41.

The spelling of 163440153324221 in words is "one hundred sixty-three trillion, four hundred forty billion, one hundred fifty-three million, three hundred twenty-four thousand, two hundred twenty-one".