7878665865795 has 32 divisors (see below), whose sum is σ = 12746324747520. Its totient is φ = 4155394734720.

The previous prime is 7878665865781. The next prime is 7878665865853. The reversal of 7878665865795 is 5975685668787.

It is not a de Polignac number, because 7878665865795 - 2¹⁸ = 7878665603651 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7619889 + ... + 8591858.

It is an arithmetic number, because the mean of its divisors is an integer number (398322648360).

Almost surely, 2^{7878665865795} is an apocalyptic number.

7878665865795 is a deficient number, since it is larger than the sum of its proper divisors (4867658881725).

7878665865795 is a wasteful number, since it uses less digits than its factorization.

7878665865795 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16212115.

The product of its digits is 42674688000, while the sum is 87.

The spelling of 7878665865795 in words is "seven trillion, eight hundred seventy-eight billion, six hundred sixty-five million, eight hundred sixty-five thousand, seven hundred ninety-five".