1605532434013 has 4 divisors (see below), whose sum is σ = 1605562323228. Its totient is φ = 1605502544800.

The previous prime is 1605532433873. The next prime is 1605532434017. The reversal of 1605532434013 is 3104342355061.

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

It can be written as a sum of positive squares in 2 ways, for example, as 638116587684 + 967415846329 = 798822^2 + 983573^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1605532434013 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 (1605532434017) 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 in 3 ways as a sum of consecutive naturals, for example, 14863888 + ... + 14971513.

It is an arithmetic number, because the mean of its divisors is an integer number (401390580807).

Almost surely, 2^{1605532434013} is an apocalyptic number.

It is an amenable number.

1605532434013 is a deficient number, since it is larger than the sum of its proper divisors (29889215).

1605532434013 is an equidigital number, since it uses as much as digits as its factorization.

1605532434013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29889214.

The product of its (nonzero) digits is 129600, while the sum is 37.

Adding to 1605532434013 its reverse (3104342355061), we get a palindrome (4709874789074).

The spelling of 1605532434013 in words is "one trillion, six hundred five billion, five hundred thirty-two million, four hundred thirty-four thousand, thirteen".