2644050649 has 2 divisors, whose sum is σ = 2644050650. Its totient is φ = 2644050648.

The previous prime is 2644050623. The next prime is 2644050679. The reversal of 2644050649 is 9460504462.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1880523225 + 763527424 = 43365^2 + 27632^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2644050649 is a prime.

It is not a weakly prime, because it can be changed into another prime (2644050679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1322025324 + 1322025325.

It is an arithmetic number, because the mean of its divisors is an integer number (1322025325).

Almost surely, 2^2644050649 is an apocalyptic number.

It is an amenable number.

2644050649 is a deficient number, since it is larger than the sum of its proper divisors (1).

2644050649 is an equidigital number, since it uses as much as digits as its factorization.

2644050649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 207360, while the sum is 40.

The square root of 2644050649 is about 51420.3330308157. Note that the first 3 decimals coincide. The cubic root of 2644050649 is about 1382.7911458736.

The spelling of 2644050649 in words is "two billion, six hundred forty-four million, fifty thousand, six hundred forty-nine".