8107844638115 has 4 divisors (see below), whose sum is σ = 9729413565744. Its totient is φ = 6486275710488.

The previous prime is 8107844638111. The next prime is 8107844638133. The reversal of 8107844638115 is 5118364487018.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8107844638115 - 2² = 8107844638111 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8107844638111) 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, 810784463807 + ... + 810784463816.

It is an arithmetic number, because the mean of its divisors is an integer number (2432353391436).

Almost surely, 2^{8107844638115} is an apocalyptic number.

8107844638115 is a deficient number, since it is larger than the sum of its proper divisors (1621568927629).

8107844638115 is a wasteful number, since it uses less digits than its factorization.

8107844638115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1621568927628.

The product of its (nonzero) digits is 5160960, while the sum is 56.

The spelling of 8107844638115 in words is "eight trillion, one hundred seven billion, eight hundred forty-four million, six hundred thirty-eight thousand, one hundred fifteen".