8638678406407 has 16 divisors (see below), whose sum is σ = 10114572686400. Its totient is φ = 7223269109760.

The previous prime is 8638678406333. The next prime is 8638678406411. The reversal of 8638678406407 is 7046048768368.

It is not a de Polignac number, because 8638678406407 - 2³¹ = 8636530922759 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8638678406467) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1438519 + ... + 4398487.

It is an arithmetic number, because the mean of its divisors is an integer number (632160792900).

Almost surely, 2^{8638678406407} is an apocalyptic number.

8638678406407 is a deficient number, since it is larger than the sum of its proper divisors (1475894279993).

8638678406407 is a wasteful number, since it uses less digits than its factorization.

8638678406407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2970186.

The product of its (nonzero) digits is 260112384, while the sum is 67.

The spelling of 8638678406407 in words is "eight trillion, six hundred thirty-eight billion, six hundred seventy-eight million, four hundred six thousand, four hundred seven".