2508809805 has 12 divisors (see below), whose sum is σ = 4348603740. Its totient is φ = 1338031872.

The previous prime is 2508809789. The next prime is 2508809839. The reversal of 2508809805 is 5089088052.

It can be written as a sum of positive squares in 2 ways, for example, as 389312361 + 2119497444 = 19731^2 + 46038^2 .

It is not a de Polignac number, because 2508809805 - 2⁴ = 2508809789 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 55751329 = 2508809805 / (2 + 5 + 0 + 8 + 8 + 0 + 9 + 8 + 0 + 5).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27875620 + ... + 27875709.

It is an arithmetic number, because the mean of its divisors is an integer number (362383645).

Almost surely, 2^2508809805 is an apocalyptic number.

It is an amenable number.

2508809805 is a deficient number, since it is larger than the sum of its proper divisors (1839793935).

2508809805 is a wasteful number, since it uses less digits than its factorization.

2508809805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55751340 (or 55751337 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 45.

The square root of 2508809805 is about 50088.0205737859. The cubic root of 2508809805 is about 1358.8011719639.

The spelling of 2508809805 in words is "two billion, five hundred eight million, eight hundred nine thousand, eight hundred five".