8638678406408 has 36 divisors (see below), whose sum is σ = 16737376893885. Its totient is φ = 4179880982400.

The previous prime is 8638678406333. The next prime is 8638678406411. The reversal of 8638678406408 is 8046048768368.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 8190231212164 + 448447194244 = 2861858^2 + 669662^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=2078302.

It is a Duffinian number.

It is an unprimeable number.

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 8 ways as a sum of consecutive naturals, for example, 257692688 + ... + 257726208.

Almost surely, 2^{8638678406408} is an apocalyptic number.

It is an amenable number.

8638678406408 is a deficient number, since it is larger than the sum of its proper divisors (8098698487477).

8638678406408 is an frugal number, since it uses more digits than its factorization.

8638678406408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67110 (or 33554 counting only the distinct ones).

The product of its (nonzero) digits is 297271296, while the sum is 68.

The spelling of 8638678406408 in words is "eight trillion, six hundred thirty-eight billion, six hundred seventy-eight million, four hundred six thousand, four hundred eight".