2446640639 has 2 divisors, whose sum is σ = 2446640640. Its totient is φ = 2446640638.

The previous prime is 2446640633. The next prime is 2446640641. The reversal of 2446640639 is 9360466442.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2446640639 is a prime.

It is a Sophie Germain prime.

Together with 2446640641, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2446640639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2446640633) 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, 1223320319 + 1223320320.

It is an arithmetic number, because the mean of its divisors is an integer number (1223320320).

Almost surely, 2^2446640639 is an apocalyptic number.

2446640639 is a deficient number, since it is larger than the sum of its proper divisors (1).

2446640639 is an equidigital number, since it uses as much as digits as its factorization.

2446640639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 746496, while the sum is 44.

The square root of 2446640639 is about 49463.5283719227. The cubic root of 2446640639 is about 1347.4833110858.

The spelling of 2446640639 in words is "two billion, four hundred forty-six million, six hundred forty thousand, six hundred thirty-nine".