2544280891 has 2 divisors, whose sum is σ = 2544280892. Its totient is φ = 2544280890.

The previous prime is 2544280883. The next prime is 2544280919. The reversal of 2544280891 is 1980824452.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2544280891 - 2³ = 2544280883 is a prime.

It is not a weakly prime, because it can be changed into another prime (2544280591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1272140445 + 1272140446.

It is an arithmetic number, because the mean of its divisors is an integer number (1272140446).

Almost surely, 2^2544280891 is an apocalyptic number.

2544280891 is a deficient number, since it is larger than the sum of its proper divisors (1).

2544280891 is an equidigital number, since it uses as much as digits as its factorization.

2544280891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 184320, while the sum is 43.

The square root of 2544280891 is about 50440.8652879786. The cubic root of 2544280891 is about 1365.1750800307.

The spelling of 2544280891 in words is "two billion, five hundred forty-four million, two hundred eighty thousand, eight hundred ninety-one".