1606512605 has 16 divisors (see below), whose sum is σ = 2044785600. Its totient is φ = 1208263680.

The previous prime is 1606512599. The next prime is 1606512613. The reversal of 1606512605 is 5062156061.

It is not a de Polignac number, because 1606512605 - 2¹⁶ = 1606447069 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52100 + ... + 76989.

It is an arithmetic number, because the mean of its divisors is an integer number (127799100).

Almost surely, 2^1606512605 is an apocalyptic number.

It is an amenable number.

1606512605 is a deficient number, since it is larger than the sum of its proper divisors (438272995).

1606512605 is a wasteful number, since it uses less digits than its factorization.

1606512605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129244.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 1606512605 is about 40081.3248907768. The cubic root of 1606512605 is about 1171.1918614055.

Adding to 1606512605 its reverse (5062156061), we get a palindrome (6668668666).

The spelling of 1606512605 in words is "one billion, six hundred six million, five hundred twelve thousand, six hundred five".