1605602013604 has 12 divisors (see below), whose sum is σ = 2906693300700. Its totient is φ = 775118213408.

The previous prime is 1605602013593. The next prime is 1605602013619. The reversal of 1605602013604 is 4063102065061.

It can be written as a sum of positive squares in 2 ways, for example, as 789524656704 + 816077356900 = 888552^2 + 903370^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1605602013604.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6920698219 + ... + 6920698450.

It is an arithmetic number, because the mean of its divisors is an integer number (242224441725).

Almost surely, 2^{1605602013604} is an apocalyptic number.

It is an amenable number.

1605602013604 is a deficient number, since it is larger than the sum of its proper divisors (1301091287096).

1605602013604 is a wasteful number, since it uses less digits than its factorization.

1605602013604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13841396702 (or 13841396700 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 34.

Adding to 1605602013604 its reverse (4063102065061), we get a palindrome (5668704078665).

The spelling of 1605602013604 in words is "one trillion, six hundred five billion, six hundred two million, thirteen thousand, six hundred four".