2799856209 has 16 divisors (see below), whose sum is σ = 3775326912. Its totient is φ = 1845516288.

The previous prime is 2799856153. The next prime is 2799856219. The reversal of 2799856209 is 9026589972.

It is not a de Polignac number, because 2799856209 - 2¹³ = 2799848017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2799856219) 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, 334297 + ... + 342569.

It is an arithmetic number, because the mean of its divisors is an integer number (235957932).

Almost surely, 2^2799856209 is an apocalyptic number.

It is an amenable number.

2799856209 is a deficient number, since it is larger than the sum of its proper divisors (975470703).

2799856209 is a wasteful number, since it uses less digits than its factorization.

2799856209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9536.

The product of its (nonzero) digits is 4898880, while the sum is 57.

The square root of 2799856209 is about 52913.6675066093. The cubic root of 2799856209 is about 1409.4356189016.

The spelling of 2799856209 in words is "two billion, seven hundred ninety-nine million, eight hundred fifty-six thousand, two hundred nine".