6484438729 has 2 divisors, whose sum is σ = 6484438730. Its totient is φ = 6484438728.

The previous prime is 6484438721. The next prime is 6484438747. The reversal of 6484438729 is 9278344846.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4244783104 + 2239655625 = 65152^2 + 47325^2 .

It is a cyclic number.

It is not a de Polignac number, because 6484438729 - 2³ = 6484438721 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6484438729.

It is not a weakly prime, because it can be changed into another prime (6484438721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3242219364 + 3242219365.

It is an arithmetic number, because the mean of its divisors is an integer number (3242219365).

Almost surely, 2^6484438729 is an apocalyptic number.

It is an amenable number.

6484438729 is a deficient number, since it is larger than the sum of its proper divisors (1).

6484438729 is an equidigital number, since it uses as much as digits as its factorization.

6484438729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9289728, while the sum is 55.

The square root of 6484438729 is about 80526.0127474346. The cubic root of 6484438729 is about 1864.7650904572.

The spelling of 6484438729 in words is "six billion, four hundred eighty-four million, four hundred thirty-eight thousand, seven hundred twenty-nine".