2544660641 has 2 divisors, whose sum is σ = 2544660642. Its totient is φ = 2544660640.

The previous prime is 2544660631. The next prime is 2544660659. The reversal of 2544660641 is 1460664452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2144060416 + 400600225 = 46304^2 + 20015^2 .

It is a cyclic number.

It is not a de Polignac number, because 2544660641 - 2⁶ = 2544660577 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2544660595 and 2544660604.

It is not a weakly prime, because it can be changed into another prime (2544660611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1272330320 + 1272330321.

It is an arithmetic number, because the mean of its divisors is an integer number (1272330321).

Almost surely, 2^2544660641 is an apocalyptic number.

It is an amenable number.

2544660641 is a deficient number, since it is larger than the sum of its proper divisors (1).

2544660641 is an equidigital number, since it uses as much as digits as its factorization.

2544660641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 138240, while the sum is 38.

The square root of 2544660641 is about 50444.6294564644. The cubic root of 2544660641 is about 1365.2429969875.

The spelling of 2544660641 in words is "two billion, five hundred forty-four million, six hundred sixty thousand, six hundred forty-one".