7878162618787 has 16 divisors (see below), whose sum is σ = 8066671534080. Its totient is φ = 7692060636000.

The previous prime is 7878162618773. The next prime is 7878162618803.

7878162618787 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 7878162618787 - 2⁷ = 7878162618659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7878162618737) 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, 5966862 + ... + 7166572.

It is an arithmetic number, because the mean of its divisors is an integer number (504166970880).

Almost surely, 2^{7878162618787} is an apocalyptic number.

7878162618787 is a deficient number, since it is larger than the sum of its proper divisors (188508915293).

7878162618787 is a wasteful number, since it uses less digits than its factorization.

7878162618787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1200714.

The product of its digits is 708083712, while the sum is 76.

The spelling of 7878162618787 in words is "seven trillion, eight hundred seventy-eight billion, one hundred sixty-two million, six hundred eighteen thousand, seven hundred eighty-seven".