1605350663605 has 16 divisors (see below), whose sum is σ = 2076743660544. Its totient is φ = 1184268778560.

The previous prime is 1605350663603. The next prime is 1605350663621. The reversal of 1605350663605 is 5063660535061.

It is not a de Polignac number, because 1605350663605 - 2¹ = 1605350663603 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 (1605350663603) 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 15 ways as a sum of consecutive naturals, for example, 12654549 + ... + 12780778.

It is an arithmetic number, because the mean of its divisors is an integer number (129796478784).

Almost surely, 2^{1605350663605} is an apocalyptic number.

It is an amenable number.

1605350663605 is a deficient number, since it is larger than the sum of its proper divisors (471392996939).

1605350663605 is a wasteful number, since it uses less digits than its factorization.

1605350663605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25436316.

The product of its (nonzero) digits is 1458000, while the sum is 46.

The spelling of 1605350663605 in words is "one trillion, six hundred five billion, three hundred fifty million, six hundred sixty-three thousand, six hundred five".