2555297891 has 4 divisors (see below), whose sum is σ = 2555457984. Its totient is φ = 2555137800.

The previous prime is 2555297887. The next prime is 2555297903. The reversal of 2555297891 is 1987925552.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2555297891 - 2² = 2555297887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2555297291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53075 + ... + 89036.

It is an arithmetic number, because the mean of its divisors is an integer number (638864496).

Almost surely, 2^2555297891 is an apocalyptic number.

2555297891 is a deficient number, since it is larger than the sum of its proper divisors (160093).

2555297891 is a wasteful number, since it uses less digits than its factorization.

2555297891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160092.

The product of its digits is 2268000, while the sum is 53.

The square root of 2555297891 is about 50549.9544114532. The cubic root of 2555297891 is about 1367.1426926392.

The spelling of 2555297891 in words is "two billion, five hundred fifty-five million, two hundred ninety-seven thousand, eight hundred ninety-one".