6425344435249 has 2 divisors, whose sum is σ = 6425344435250. Its totient is φ = 6425344435248.

The previous prime is 6425344435241. The next prime is 6425344435277. The reversal of 6425344435249 is 9425344435246.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6063133049649 + 362211385600 = 2462343^2 + 601840^2 .

It is a cyclic number.

It is not a de Polignac number, because 6425344435249 - 2³ = 6425344435241 is a prime.

It is a super-2 number, since 2×6425344435249² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6425344435249.

It is not a weakly prime, because it can be changed into another prime (6425344435241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3212672217624 + 3212672217625.

It is an arithmetic number, because the mean of its divisors is an integer number (3212672217625).

Almost surely, 2^{6425344435249} is an apocalyptic number.

It is an amenable number.

6425344435249 is a deficient number, since it is larger than the sum of its proper divisors (1).

6425344435249 is an equidigital number, since it uses as much as digits as its factorization.

6425344435249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 49766400, while the sum is 55.

The spelling of 6425344435249 in words is "six trillion, four hundred twenty-five billion, three hundred forty-four million, four hundred thirty-five thousand, two hundred forty-nine".