2799809825 has 6 divisors (see below), whose sum is σ = 3471764214. Its totient is φ = 2239847840.

The previous prime is 2799809813. The next prime is 2799809827. The reversal of 2799809825 is 5289089972.

It can be written as a sum of positive squares in 3 ways, for example, as 330912481 + 2468897344 = 18191^2 + 49688^2 .

It is not a de Polignac number, because 2799809825 - 2⁸ = 2799809569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2799809827) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55996172 + ... + 55996221.

It is an arithmetic number, because the mean of its divisors is an integer number (578627369).

Almost surely, 2^2799809825 is an apocalyptic number.

2799809825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2799809825 is a deficient number, since it is larger than the sum of its proper divisors (671954389).

2799809825 is a wasteful number, since it uses less digits than its factorization.

2799809825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111992403 (or 111992398 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 59.

The square root of 2799809825 is about 52913.2292059368. The cubic root of 2799809825 is about 1409.4278356896.

The spelling of 2799809825 in words is "two billion, seven hundred ninety-nine million, eight hundred nine thousand, eight hundred twenty-five".