6448424729 has 2 divisors, whose sum is σ = 6448424730. Its totient is φ = 6448424728.

The previous prime is 6448424651. The next prime is 6448424737. The reversal of 6448424729 is 9274248446.

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., 6419695129 + 28729600 = 80123^2 + 5360^2 .

It is a cyclic number.

It is not a de Polignac number, because 6448424729 - 2⁸ = 6448424473 is a prime.

It is not a weakly prime, because it can be changed into another prime (6448424789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3224212364 + 3224212365.

It is an arithmetic number, because the mean of its divisors is an integer number (3224212365).

Almost surely, 2^6448424729 is an apocalyptic number.

It is an amenable number.

6448424729 is a deficient number, since it is larger than the sum of its proper divisors (1).

6448424729 is an equidigital number, since it uses as much as digits as its factorization.

6448424729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3096576, while the sum is 50.

The square root of 6448424729 is about 80302.0842133005. The cubic root of 6448424729 is about 1861.3064326333.

The spelling of 6448424729 in words is "six billion, four hundred forty-eight million, four hundred twenty-four thousand, seven hundred twenty-nine".