2644040449 has 2 divisors, whose sum is σ = 2644040450. Its totient is φ = 2644040448.

The previous prime is 2644040407. The next prime is 2644040467. The reversal of 2644040449 is 9440404462.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2135086849 + 508953600 = 46207^2 + 22560^2 .

It is a cyclic number.

It is not a de Polignac number, because 2644040449 - 2²³ = 2635651841 is a prime.

It is not a weakly prime, because it can be changed into another prime (2644040249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1322020224 + 1322020225.

It is an arithmetic number, because the mean of its divisors is an integer number (1322020225).

Almost surely, 2^2644040449 is an apocalyptic number.

It is an amenable number.

2644040449 is a deficient number, since it is larger than the sum of its proper divisors (1).

2644040449 is an equidigital number, since it uses as much as digits as its factorization.

2644040449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 110592, while the sum is 37.

The square root of 2644040449 is about 51420.2338481653. The cubic root of 2644040449 is about 1382.7893677322.

The spelling of 2644040449 in words is "two billion, six hundred forty-four million, forty thousand, four hundred forty-nine".