16442134205623 has 4 divisors (see below), whose sum is σ = 18791010520720. Its totient is φ = 14093257890528.

The previous prime is 16442134205621. The next prime is 16442134205669. The reversal of 16442134205623 is 32650243124461.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16442134205623 - 2¹ = 16442134205621 is a prime.

It is a super-3 number, since 3×16442134205623³ (a number of 41 digits) contains 333 as substring.

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 16442134205623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16442134205621) 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, 1174438157538 + ... + 1174438157551.

It is an arithmetic number, because the mean of its divisors is an integer number (4697752630180).

Almost surely, 2^{16442134205623} is an apocalyptic number.

16442134205623 is a deficient number, since it is larger than the sum of its proper divisors (2348876315097).

16442134205623 is an equidigital number, since it uses as much as digits as its factorization.

16442134205623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2348876315096.

The product of its (nonzero) digits is 829440, while the sum is 43.

The spelling of 16442134205623 in words is "sixteen trillion, four hundred forty-two billion, one hundred thirty-four million, two hundred five thousand, six hundred twenty-three".