2506506605 has 16 divisors (see below), whose sum is σ = 3186961200. Its totient is φ = 1885934592.

The previous prime is 2506506601. The next prime is 2506506623. The reversal of 2506506605 is 5066056052.

It can be written as a sum of positive squares in 8 ways, for example, as 314956009 + 2191550596 = 17747^2 + 46814^2 .

It is a cyclic number.

It is not a de Polignac number, because 2506506605 - 2² = 2506506601 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2506506601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122147 + ... + 141183.

It is an arithmetic number, because the mean of its divisors is an integer number (199185075).

Almost surely, 2^2506506605 is an apocalyptic number.

It is an amenable number.

2506506605 is a deficient number, since it is larger than the sum of its proper divisors (680454595).

2506506605 is a wasteful number, since it uses less digits than its factorization.

2506506605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20608.

The product of its (nonzero) digits is 54000, while the sum is 35.

The square root of 2506506605 is about 50065.0237690945. The cubic root of 2506506605 is about 1358.3852311669.

The spelling of 2506506605 in words is "two billion, five hundred six million, five hundred six thousand, six hundred five".