8044378501815 has 12 divisors (see below), whose sum is σ = 13943589403224. Its totient is φ = 4290335200944.

The previous prime is 8044378501813. The next prime is 8044378501871. The reversal of 8044378501815 is 5181058734408.

8044378501815 is a `hidden beast` number, since 8 + 0 + 44 + 378 + 50 + 181 + 5 = 666.

It is not a de Polignac number, because 8044378501815 - 2¹ = 8044378501813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8044378501811) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 89381983309 + ... + 89381983398.

It is an arithmetic number, because the mean of its divisors is an integer number (1161965783602).

Almost surely, 2^{8044378501815} is an apocalyptic number.

8044378501815 is a deficient number, since it is larger than the sum of its proper divisors (5899210901409).

8044378501815 is a wasteful number, since it uses less digits than its factorization.

8044378501815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178763966718 (or 178763966715 counting only the distinct ones).

The product of its (nonzero) digits is 4300800, while the sum is 54.

The spelling of 8044378501815 in words is "eight trillion, forty-four billion, three hundred seventy-eight million, five hundred one thousand, eight hundred fifteen".