6256663817 has 2 divisors, whose sum is σ = 6256663818. Its totient is φ = 6256663816.

The previous prime is 6256663811. The next prime is 6256663859. The reversal of 6256663817 is 7183666526.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3776225401 + 2480438416 = 61451^2 + 49804^2 .

It is a cyclic number.

It is not a de Polignac number, because 6256663817 - 2¹⁴ = 6256647433 is a prime.

It is not a weakly prime, because it can be changed into another prime (6256663811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3128331908 + 3128331909.

It is an arithmetic number, because the mean of its divisors is an integer number (3128331909).

Almost surely, 2^6256663817 is an apocalyptic number.

It is an amenable number.

6256663817 is a deficient number, since it is larger than the sum of its proper divisors (1).

6256663817 is an equidigital number, since it uses as much as digits as its factorization.

6256663817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2177280, while the sum is 50.

The square root of 6256663817 is about 79099.0759554118. The cubic root of 6256663817 is about 1842.6701757692.

The spelling of 6256663817 in words is "six billion, two hundred fifty-six million, six hundred sixty-three thousand, eight hundred seventeen".