1605273796036 has 9 divisors (see below), whose sum is σ = 2809233577549. Its totient is φ = 802635631024.

The previous prime is 1605273796031. The next prime is 1605273796057. The reversal of 1605273796036 is 6306973725061.

The square root of 1605273796036 is 1266994.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 6930562500 + 1598343233536 = 83250^2 + 1264256^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1605273796031) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2217240 + ... + 2850736.

Almost surely, 2^{1605273796036} is an apocalyptic number.

1605273796036 is the 1266994-th square number.

It is an amenable number.

1605273796036 is a deficient number, since it is larger than the sum of its proper divisors (1203959781513).

1605273796036 is an frugal number, since it uses more digits than its factorization.

1605273796036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1266998 (or 633499 counting only the distinct ones).

The product of its (nonzero) digits is 8573040, while the sum is 55.

The spelling of 1605273796036 in words is "one trillion, six hundred five billion, two hundred seventy-three million, seven hundred ninety-six thousand, thirty-six".