6394556972808 has 48 divisors (see below), whose sum is σ = 17337437020800. Its totient is φ = 2129199579360.

The previous prime is 6394556972801. The next prime is 6394556972827. The reversal of 6394556972808 is 8082796554936.

It is a happy number.

6394556972808 is a `hidden beast` number, since 6 + 3 + 9 + 455 + 6 + 97 + 2 + 80 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is not an unprimeable number, because it can be changed into a prime (6394556972801) 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 11 ways as a sum of consecutive naturals, for example, 48254448 + ... + 48386783.

It is an arithmetic number, because the mean of its divisors is an integer number (361196604600).

Almost surely, 2^{6394556972808} is an apocalyptic number.

It is an amenable number.

6394556972808 is an abundant number, since it is smaller than the sum of its proper divisors (10942880047992).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6394556972808 is a wasteful number, since it uses less digits than its factorization.

6394556972808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96642162 (or 96642155 counting only the distinct ones).

The product of its (nonzero) digits is 783820800, while the sum is 72.

The spelling of 6394556972808 in words is "six trillion, three hundred ninety-four billion, five hundred fifty-six million, nine hundred seventy-two thousand, eight hundred eight".