6464674729 has 2 divisors, whose sum is σ = 6464674730. Its totient is φ = 6464674728.

The previous prime is 6464674673. The next prime is 6464674757. The reversal of 6464674729 is 9274764646.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4136419225 + 2328255504 = 64315^2 + 48252^2 .

It is a cyclic number.

It is not a de Polignac number, because 6464674729 - 2⁹ = 6464674217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6464674729.

It is not a weakly prime, because it can be changed into another prime (6464674429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3232337364 + 3232337365.

It is an arithmetic number, because the mean of its divisors is an integer number (3232337365).

Almost surely, 2^6464674729 is an apocalyptic number.

It is an amenable number.

6464674729 is a deficient number, since it is larger than the sum of its proper divisors (1).

6464674729 is an equidigital number, since it uses as much as digits as its factorization.

6464674729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12192768, while the sum is 55.

The square root of 6464674729 is about 80403.2009872741. The cubic root of 6464674729 is about 1862.8686156224.

The spelling of 6464674729 in words is "six billion, four hundred sixty-four million, six hundred seventy-four thousand, seven hundred twenty-nine".