6551864434793 has 2 divisors, whose sum is σ = 6551864434794. Its totient is φ = 6551864434792.

The previous prime is 6551864434757. The next prime is 6551864434813. The reversal of 6551864434793 is 3974344681556.

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., 6112702422544 + 439162012249 = 2472388^2 + 662693^2 .

It is a cyclic number.

It is not a de Polignac number, because 6551864434793 - 2¹⁰ = 6551864433769 is a prime.

It is not a weakly prime, because it can be changed into another prime (6551864434733) 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, 3275932217396 + 3275932217397.

It is an arithmetic number, because the mean of its divisors is an integer number (3275932217397).

Almost surely, 2^{6551864434793} is an apocalyptic number.

It is an amenable number.

6551864434793 is a deficient number, since it is larger than the sum of its proper divisors (1).

6551864434793 is an equidigital number, since it uses as much as digits as its factorization.

6551864434793 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 261273600, while the sum is 65.

The spelling of 6551864434793 in words is "six trillion, five hundred fifty-one billion, eight hundred sixty-four million, four hundred thirty-four thousand, seven hundred ninety-three".