1605601104 has 40 divisors (see below), whose sum is σ = 4281606912. Its totient is φ = 517935360.

The previous prime is 1605601103. The next prime is 1605601111. The reversal of 1605601104 is 4011065061.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1605601103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 538029 + ... + 541004.

Almost surely, 2^1605601104 is an apocalyptic number.

It is an amenable number.

1605601104 is an abundant number, since it is smaller than the sum of its proper divisors (2676005808).

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

1605601104 is a wasteful number, since it uses less digits than its factorization.

1605601104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1079075 (or 1079069 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 1605601104 is about 40069.9526328644. The cubic root of 1605601104 is about 1170.9703164031.

Adding to 1605601104 its reverse (4011065061), we get a palindrome (5616666165).

The spelling of 1605601104 in words is "one billion, six hundred five million, six hundred one thousand, one hundred four".