6468435257 has 2 divisors, whose sum is σ = 6468435258. Its totient is φ = 6468435256.

The previous prime is 6468435251. The next prime is 6468435283. The reversal of 6468435257 is 7525348646.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6036668416 + 431766841 = 77696^2 + 20779^2 .

It is a cyclic number.

It is not a de Polignac number, because 6468435257 - 2¹² = 6468431161 is a prime.

It is not a weakly prime, because it can be changed into another prime (6468435251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3234217628 + 3234217629.

It is an arithmetic number, because the mean of its divisors is an integer number (3234217629).

Almost surely, 2^6468435257 is an apocalyptic number.

It is an amenable number.

6468435257 is a deficient number, since it is larger than the sum of its proper divisors (1).

6468435257 is an equidigital number, since it uses as much as digits as its factorization.

6468435257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4838400, while the sum is 50.

The square root of 6468435257 is about 80426.5830245199. The cubic root of 6468435257 is about 1863.2297583956.

The spelling of 6468435257 in words is "six billion, four hundred sixty-eight million, four hundred thirty-five thousand, two hundred fifty-seven".