1605120016 has 20 divisors (see below), whose sum is σ = 3162632400. Its totient is φ = 788956832.

The previous prime is 1605120001. The next prime is 1605120017. The reversal of 1605120016 is 6100215061.

It is not an unprimeable number, because it can be changed into a prime (1605120017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 849226 + ... + 851113.

It is an arithmetic number, because the mean of its divisors is an integer number (158131620).

Almost surely, 2^1605120016 is an apocalyptic number.

1605120016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1605120016 is a deficient number, since it is larger than the sum of its proper divisors (1557512384).

1605120016 is a wasteful number, since it uses less digits than its factorization.

1605120016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1700406 (or 1700400 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 1605120016 is about 40063.9490814373. The cubic root of 1605120016 is about 1170.8533516850.

Adding to 1605120016 its reverse (6100215061), we get a palindrome (7705335077).

The spelling of 1605120016 in words is "one billion, six hundred five million, one hundred twenty thousand, sixteen".