2544380561 has 2 divisors, whose sum is σ = 2544380562. Its totient is φ = 2544380560.

The previous prime is 2544380557. The next prime is 2544380621. The reversal of 2544380561 is 1650834452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1949752336 + 594628225 = 44156^2 + 24385^2 .

It is a cyclic number.

It is not a de Polignac number, because 2544380561 - 2² = 2544380557 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2544380551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1272190280 + 1272190281.

It is an arithmetic number, because the mean of its divisors is an integer number (1272190281).

Almost surely, 2^2544380561 is an apocalyptic number.

It is an amenable number.

2544380561 is a deficient number, since it is larger than the sum of its proper divisors (1).

2544380561 is an equidigital number, since it uses as much as digits as its factorization.

2544380561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 115200, while the sum is 38.

The square root of 2544380561 is about 50441.8532669053. The cubic root of 2544380561 is about 1365.1929063150.

The spelling of 2544380561 in words is "two billion, five hundred forty-four million, three hundred eighty thousand, five hundred sixty-one".