2644005436433 has 2 divisors, whose sum is σ = 2644005436434. Its totient is φ = 2644005436432.

The previous prime is 2644005436313. The next prime is 2644005436439. The reversal of 2644005436433 is 3346345004462.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1973665336384 + 670340100049 = 1404872^2 + 818743^2 .

It is a cyclic number.

It is not a de Polignac number, because 2644005436433 - 2¹² = 2644005432337 is a prime.

It is not a weakly prime, because it can be changed into another prime (2644005436439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1322002718216 + 1322002718217.

It is an arithmetic number, because the mean of its divisors is an integer number (1322002718217).

Almost surely, 2^{2644005436433} is an apocalyptic number.

It is an amenable number.

2644005436433 is a deficient number, since it is larger than the sum of its proper divisors (1).

2644005436433 is an equidigital number, since it uses as much as digits as its factorization.

2644005436433 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2488320, while the sum is 44.

The spelling of 2644005436433 in words is "two trillion, six hundred forty-four billion, five million, four hundred thirty-six thousand, four hundred thirty-three".