6256543493 has 2 divisors, whose sum is σ = 6256543494. Its totient is φ = 6256543492.

The previous prime is 6256543477. The next prime is 6256543519. The reversal of 6256543493 is 3943456526.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4149549889 + 2106993604 = 64417^2 + 45902^2 .

It is a cyclic number.

It is not a de Polignac number, because 6256543493 - 2⁴ = 6256543477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6256543463) 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, 3128271746 + 3128271747.

It is an arithmetic number, because the mean of its divisors is an integer number (3128271747).

Almost surely, 2^6256543493 is an apocalyptic number.

It is an amenable number.

6256543493 is a deficient number, since it is larger than the sum of its proper divisors (1).

6256543493 is an equidigital number, since it uses as much as digits as its factorization.

6256543493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2332800, while the sum is 47.

The square root of 6256543493 is about 79098.3153613274. The cubic root of 6256543493 is about 1842.6583633575.

The spelling of 6256543493 in words is "six billion, two hundred fifty-six million, five hundred forty-three thousand, four hundred ninety-three".