2655178209 has 12 divisors (see below), whose sum is σ = 3840881616. Its totient is φ = 1767523032.

The previous prime is 2655178181. The next prime is 2655178247. The reversal of 2655178209 is 9028715562.

2655178209 is a `hidden beast` number, since 2 + 6 + 551 + 78 + 20 + 9 = 666.

2655178209 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2655178209 - 2⁵ = 2655178177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2655178249) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 209827 + ... + 222120.

It is an arithmetic number, because the mean of its divisors is an integer number (320073468).

Almost surely, 2^2655178209 is an apocalyptic number.

It is an amenable number.

2655178209 is a deficient number, since it is larger than the sum of its proper divisors (1185703407).

2655178209 is a wasteful number, since it uses less digits than its factorization.

2655178209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432636 (or 432633 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The square root of 2655178209 is about 51528.4213711229. The cubic root of 2655178209 is about 1384.7282691420.

The spelling of 2655178209 in words is "two billion, six hundred fifty-five million, one hundred seventy-eight thousand, two hundred nine".