5646444653639 has 2 divisors, whose sum is σ = 5646444653640. Its totient is φ = 5646444653638.

The previous prime is 5646444653617. The next prime is 5646444653693. The reversal of 5646444653639 is 9363564446465.

5646444653639 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

Together with next prime (5646444653693) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 5646444653639 - 2⁸ = 5646444653383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5646444653539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2823222326819 + 2823222326820.

It is an arithmetic number, because the mean of its divisors is an integer number (2823222326820).

Almost surely, 2^{5646444653639} is an apocalyptic number.

5646444653639 is a deficient number, since it is larger than the sum of its proper divisors (1).

5646444653639 is an equidigital number, since it uses as much as digits as its factorization.

5646444653639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 671846400, while the sum is 65.

The spelling of 5646444653639 in words is "five trillion, six hundred forty-six billion, four hundred forty-four million, six hundred fifty-three thousand, six hundred thirty-nine".