2052507665 has 16 divisors (see below), whose sum is σ = 2808500688. Its totient is φ = 1426538496.

The previous prime is 2052507637. The next prime is 2052507679. The reversal of 2052507665 is 5667052502.

It can be written as a sum of positive squares in 8 ways, for example, as 21743569 + 2030764096 = 4663^2 + 45064^2 .

It is a cyclic number.

It is not a de Polignac number, because 2052507665 - 2¹⁴ = 2052491281 is a prime.

It is a Duffinian number.

It is a Curzon 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, 927632 + ... + 929841.

It is an arithmetic number, because the mean of its divisors is an integer number (175531293).

Almost surely, 2^2052507665 is an apocalyptic number.

It is an amenable number.

2052507665 is a deficient number, since it is larger than the sum of its proper divisors (755993023).

2052507665 is a wasteful number, since it uses less digits than its factorization.

2052507665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1857508.

The product of its (nonzero) digits is 126000, while the sum is 38.

The square root of 2052507665 is about 45304.6097544168. The cubic root of 2052507665 is about 1270.8518609524.

The spelling of 2052507665 in words is "two billion, fifty-two million, five hundred seven thousand, six hundred sixty-five".