1605113312 has 48 divisors (see below), whose sum is σ = 3628800000. Its totient is φ = 691194240.

The previous prime is 1605113299. The next prime is 1605113329. The reversal of 1605113312 is 2133115061.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113312 + ... + 126687.

It is an arithmetic number, because the mean of its divisors is an integer number (75600000).

Almost surely, 2^1605113312 is an apocalyptic number.

It is an amenable number.

1605113312 is an abundant number, since it is smaller than the sum of its proper divisors (2023686688).

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

1605113312 is a wasteful number, since it uses less digits than its factorization.

1605113312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240039 (or 240031 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 1605113312 is about 40063.8654151094. The cubic root of 1605113312 is about 1170.8517216071.

Adding to 1605113312 its reverse (2133115061), we get a palindrome (3738228373).

The spelling of 1605113312 in words is "one billion, six hundred five million, one hundred thirteen thousand, three hundred twelve".