5409646820729 has 2 divisors, whose sum is σ = 5409646820730. Its totient is φ = 5409646820728.

The previous prime is 5409646820707. The next prime is 5409646820779. The reversal of 5409646820729 is 9270286469045.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3789843349504 + 1619803471225 = 1946752^2 + 1272715^2 .

It is a cyclic number.

It is not a de Polignac number, because 5409646820729 - 2¹⁶ = 5409646755193 is a prime.

It is not a weakly prime, because it can be changed into another prime (5409646820779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2704823410364 + 2704823410365.

It is an arithmetic number, because the mean of its divisors is an integer number (2704823410365).

Almost surely, 2^{5409646820729} is an apocalyptic number.

It is an amenable number.

5409646820729 is a deficient number, since it is larger than the sum of its proper divisors (1).

5409646820729 is an equidigital number, since it uses as much as digits as its factorization.

5409646820729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52254720, while the sum is 62.

The spelling of 5409646820729 in words is "five trillion, four hundred nine billion, six hundred forty-six million, eight hundred twenty thousand, seven hundred twenty-nine".