1605423204023 has 2 divisors, whose sum is σ = 1605423204024. Its totient is φ = 1605423204022.

The previous prime is 1605423204001. The next prime is 1605423204067. The reversal of 1605423204023 is 3204023245061.

It is a weak prime.

It is an emirp because it is prime and its reverse (3204023245061) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1605423204023 - 2¹⁴ = 1605423187639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1605423204323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 802711602011 + 802711602012.

It is an arithmetic number, because the mean of its divisors is an integer number (802711602012).

Almost surely, 2^{1605423204023} is an apocalyptic number.

1605423204023 is a deficient number, since it is larger than the sum of its proper divisors (1).

1605423204023 is an equidigital number, since it uses as much as digits as its factorization.

1605423204023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 32.

Adding to 1605423204023 its reverse (3204023245061), we get a palindrome (4809446449084).

The spelling of 1605423204023 in words is "one trillion, six hundred five billion, four hundred twenty-three million, two hundred four thousand, twenty-three".