6256631878209 has 24 divisors (see below), whose sum is σ = 9105198939200. Its totient is φ = 4139794954080.

The previous prime is 6256631878199. The next prime is 6256631878247. The reversal of 6256631878209 is 9028781366526.

It is a happy number.

6256631878209 is a `hidden beast` number, since 62 + 56 + 6 + 318 + 7 + 8 + 209 = 666.

It is not a de Polignac number, because 6256631878209 - 2⁵ = 6256631878177 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6256631878009) 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 in 23 ways as a sum of consecutive naturals, for example, 3265044 + ... + 4813914.

Almost surely, 2^{6256631878209} is an apocalyptic number.

It is an amenable number.

6256631878209 is a deficient number, since it is larger than the sum of its proper divisors (2848567060991).

6256631878209 is a wasteful number, since it uses less digits than its factorization.

6256631878209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1552245 (or 1552242 counting only the distinct ones).

The product of its (nonzero) digits is 52254720, while the sum is 63.

The spelling of 6256631878209 in words is "six trillion, two hundred fifty-six billion, six hundred thirty-one million, eight hundred seventy-eight thousand, two hundred nine".