2644040407 has 2 divisors, whose sum is σ = 2644040408. Its totient is φ = 2644040406.

The previous prime is 2644040393. The next prime is 2644040449. The reversal of 2644040407 is 7040404462.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2644040407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2644040467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1322020203 + 1322020204.

It is an arithmetic number, because the mean of its divisors is an integer number (1322020204).

Almost surely, 2^2644040407 is an apocalyptic number.

2644040407 is a deficient number, since it is larger than the sum of its proper divisors (1).

2644040407 is an equidigital number, since it uses as much as digits as its factorization.

2644040407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21504, while the sum is 31.

The square root of 2644040407 is about 51420.2334397657. The cubic root of 2644040407 is about 1382.7893604104.

Adding to 2644040407 its reverse (7040404462), we get a palindrome (9684444869).

The spelling of 2644040407 in words is "two billion, six hundred forty-four million, forty thousand, four hundred seven".