787878787878787 has 24 divisors (see below), whose sum is σ = 886161174212160. Its totient is φ = 699591846399600.

The previous prime is 787878787878751. The next prime is 787878787878811.

787878787878787 is nontrivially palindromic in base 10.

787878787878787 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is not a de Polignac number, because 787878787878787 - 2¹⁹ = 787878787354499 is a prime.

It is an alternating number because its digits alternate between odd and even.

787878787878787 is an undulating number in base 10.

It is not an unprimeable number, because it can be changed into a prime (787878787878737) 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 23 ways as a sum of consecutive naturals, for example, 995141112 + ... + 995932522.

It is an arithmetic number, because the mean of its divisors is an integer number (36923382258840).

Almost surely, 2^{787878787878787} is an apocalyptic number.

787878787878787 is a deficient number, since it is larger than the sum of its proper divisors (98282386333373).

787878787878787 is a wasteful number, since it uses less digits than its factorization.

787878787878787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 982815 (or 982804 counting only the distinct ones).

The product of its digits is 12089663946752, while the sum is 112.

The spelling of 787878787878787 in words is "seven hundred eighty-seven trillion, eight hundred seventy-eight billion, seven hundred eighty-seven million, eight hundred seventy-eight thousand, seven hundred eighty-seven".