163444346556623 has 8 divisors (see below), whose sum is σ = 178303126176336. Its totient is φ = 148585600713600.

The previous prime is 163444346556599. The next prime is 163444346556649. The reversal of 163444346556623 is 326655643444361.

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 163444346556623 - 2¹⁴ = 163444346540239 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 (163444346556823) 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, 2264093 + ... + 18221273.

It is an arithmetic number, because the mean of its divisors is an integer number (22287890772042).

Almost surely, 2^{163444346556623} is an apocalyptic number.

163444346556623 is a deficient number, since it is larger than the sum of its proper divisors (14858779619713).

163444346556623 is a wasteful number, since it uses less digits than its factorization.

163444346556623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16888345.

The product of its digits is 447897600, while the sum is 62.

The spelling of 163444346556623 in words is "one hundred sixty-three trillion, four hundred forty-four billion, three hundred forty-six million, five hundred fifty-six thousand, six hundred twenty-three".