2555819809 has 4 divisors (see below), whose sum is σ = 2572745920. Its totient is φ = 2538893700.

The previous prime is 2555819753. The next prime is 2555819821. The reversal of 2555819809 is 9089185552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2555819809 - 2³¹ = 408336161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2555819839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8462829 + ... + 8463130.

It is an arithmetic number, because the mean of its divisors is an integer number (643186480).

Almost surely, 2^2555819809 is an apocalyptic number.

It is an amenable number.

2555819809 is a deficient number, since it is larger than the sum of its proper divisors (16926111).

2555819809 is a wasteful number, since it uses less digits than its factorization.

2555819809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16926110.

The product of its (nonzero) digits is 1296000, while the sum is 52.

The square root of 2555819809 is about 50555.1165462013. The cubic root of 2555819809 is about 1367.2357656501.

The spelling of 2555819809 in words is "two billion, five hundred fifty-five million, eight hundred nineteen thousand, eight hundred nine".