6438250856 has 16 divisors (see below), whose sum is σ = 12269618340. Its totient is φ = 3166352640.

The previous prime is 6438250831. The next prime is 6438250859. The reversal of 6438250856 is 6580528346.

It can be written as a sum of positive squares in 2 ways, for example, as 5462688100 + 975562756 = 73910^2 + 31234^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 6438250856.

It is not an unprimeable number, because it can be changed into a prime (6438250859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6596081 + ... + 6597056.

Almost surely, 2^6438250856 is an apocalyptic number.

It is an amenable number.

6438250856 is a deficient number, since it is larger than the sum of its proper divisors (5831367484).

6438250856 is a wasteful number, since it uses less digits than its factorization.

6438250856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13193204 (or 13193200 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 47.

The square root of 6438250856 is about 80238.7117045133. The cubic root of 6438250856 is about 1860.3270377272.

The spelling of 6438250856 in words is "six billion, four hundred thirty-eight million, two hundred fifty thousand, eight hundred fifty-six".