2544968821 has 2 divisors, whose sum is σ = 2544968822. Its totient is φ = 2544968820.

The previous prime is 2544968807. The next prime is 2544968827. The reversal of 2544968821 is 1288694452.

2544968821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2475062500 + 69906321 = 49750^2 + 8361^2 .

It is a cyclic number.

It is not a de Polignac number, because 2544968821 - 2¹⁷ = 2544837749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2544968827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1272484410 + 1272484411.

It is an arithmetic number, because the mean of its divisors is an integer number (1272484411).

Almost surely, 2^2544968821 is an apocalyptic number.

It is an amenable number.

2544968821 is a deficient number, since it is larger than the sum of its proper divisors (1).

2544968821 is an equidigital number, since it uses as much as digits as its factorization.

2544968821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1105920, while the sum is 49.

The square root of 2544968821 is about 50447.6840003582. The cubic root of 2544968821 is about 1365.2981089339.

The spelling of 2544968821 in words is "two billion, five hundred forty-four million, nine hundred sixty-eight thousand, eight hundred twenty-one".