2644768354369 has 2 divisors, whose sum is σ = 2644768354370. Its totient is φ = 2644768354368.

The previous prime is 2644768354339. The next prime is 2644768354399. The reversal of 2644768354369 is 9634538674462.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (2644768354339) and next prime (2644768354399).

It can be written as a sum of positive squares in only one way, i.e., 2373103278144 + 271665076225 = 1540488^2 + 521215^2 .

It is a cyclic number.

It is not a de Polignac number, because 2644768354369 - 2¹³ = 2644768346177 is a prime.

It is a super-2 number, since 2×2644768354369² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2644768354339) 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, 1322384177184 + 1322384177185.

It is an arithmetic number, because the mean of its divisors is an integer number (1322384177185).

Almost surely, 2^{2644768354369} is an apocalyptic number.

It is an amenable number.

2644768354369 is a deficient number, since it is larger than the sum of its proper divisors (1).

2644768354369 is an equidigital number, since it uses as much as digits as its factorization.

2644768354369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 627056640, while the sum is 67.

The spelling of 2644768354369 in words is "two trillion, six hundred forty-four billion, seven hundred sixty-eight million, three hundred fifty-four thousand, three hundred sixty-nine".