1605383774604 has 144 divisors (see below), whose sum is σ = 4297066405632. Its totient is φ = 504330685056.

The previous prime is 1605383774593. The next prime is 1605383774633. The reversal of 1605383774604 is 4064773835061.

It is a happy number.

1605383774604 is a `hidden beast` number, since 1 + 6 + 0 + 538 + 37 + 74 + 6 + 0 + 4 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 25602739 + ... + 25665365.

It is an arithmetic number, because the mean of its divisors is an integer number (29840738928).

Almost surely, 2^{1605383774604} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1605383774604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2148533202816).

1605383774604 is an abundant number, since it is smaller than the sum of its proper divisors (2691682631028).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1605383774604 is a wasteful number, since it uses less digits than its factorization.

1605383774604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63116 (or 63111 counting only the distinct ones).

The product of its (nonzero) digits is 10160640, while the sum is 54.

The spelling of 1605383774604 in words is "one trillion, six hundred five billion, three hundred eighty-three million, seven hundred seventy-four thousand, six hundred four".