1605604343426 has 16 divisors (see below), whose sum is σ = 2422412182008. Its totient is φ = 798133939200.

The previous prime is 1605604343417. The next prime is 1605604343443. The reversal of 1605604343426 is 6243434065061.

It can be written as a sum of positive squares in 4 ways, for example, as 1597445737801 + 8158605625 = 1263901^2 + 90325^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12892616 + ... + 13016556.

Almost surely, 2^{1605604343426} is an apocalyptic number.

1605604343426 is a deficient number, since it is larger than the sum of its proper divisors (816807838582).

1605604343426 is a wasteful number, since it uses less digits than its factorization.

1605604343426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161557.

The product of its (nonzero) digits is 1244160, while the sum is 44.

The spelling of 1605604343426 in words is "one trillion, six hundred five billion, six hundred four million, three hundred forty-three thousand, four hundred twenty-six".