16604144423 has 4 divisors (see below), whose sum is σ = 16615573368. Its totient is φ = 16592715480.

The previous prime is 16604144351. The next prime is 16604144489. The reversal of 16604144423 is 32444140661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32444140661 = 15107 ⋅2147623.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16604144423 is a prime.

It is a super-2 number, since 2×16604144423² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16604149423) 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, 5712293 + ... + 5715198.

It is an arithmetic number, because the mean of its divisors is an integer number (4153893342).

Almost surely, 2^16604144423 is an apocalyptic number.

16604144423 is a deficient number, since it is larger than the sum of its proper divisors (11428945).

16604144423 is a wasteful number, since it uses less digits than its factorization.

16604144423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11428944.

The product of its (nonzero) digits is 55296, while the sum is 35.

The spelling of 16604144423 in words is "sixteen billion, six hundred four million, one hundred forty-four thousand, four hundred twenty-three".