1605631112 has 36 divisors (see below), whose sum is σ = 3117627765. Its totient is φ = 775218240.

The previous prime is 1605631103. The next prime is 1605631151. The reversal of 1605631112 is 2111365061.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 1351738756 + 253892356 = 36766^2 + 15934^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=28334.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3513188 + ... + 3513644.

Almost surely, 2^1605631112 is an apocalyptic number.

It is an amenable number.

1605631112 is a deficient number, since it is larger than the sum of its proper divisors (1511996653).

1605631112 is an frugal number, since it uses more digits than its factorization.

With its successor (1605631113) it forms an eRAP, since the sums of their prime factors are consecutive (982 and 983).

1605631112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 982 (or 490 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 1605631112 is about 40070.3270762793. The cubic root of 1605631112 is about 1170.9776113363.

Adding to 1605631112 its reverse (2111365061), we get a palindrome (3716996173).

The spelling of 1605631112 in words is "one billion, six hundred five million, six hundred thirty-one thousand, one hundred twelve".