2555168891 has 6 divisors (see below), whose sum is σ = 2787639876. Its totient is φ = 2322728400.

The previous prime is 2555168851. The next prime is 2555168897. The reversal of 2555168891 is 1988615552.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-2555168891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2555168897) 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, 160031 + ... + 175271.

It is an arithmetic number, because the mean of its divisors is an integer number (464606646).

Almost surely, 2^2555168891 is an apocalyptic number.

2555168891 is a deficient number, since it is larger than the sum of its proper divisors (232470985).

2555168891 is an frugal number, since it uses more digits than its factorization.

2555168891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30493 (or 15252 counting only the distinct ones).

The product of its digits is 864000, while the sum is 50.

The square root of 2555168891 is about 50548.6784298066. The cubic root of 2555168891 is about 1367.1196862707.

The spelling of 2555168891 in words is "two billion, five hundred fifty-five million, one hundred sixty-eight thousand, eight hundred ninety-one".