7789669878 has 16 divisors (see below), whose sum is σ = 15581971440. Its totient is φ = 2596118016.

The previous prime is 7789669861. The next prime is 7789669907. The reversal of 7789669878 is 8789669877.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70075 + ... + 143142.

It is an arithmetic number, because the mean of its divisors is an integer number (973873215).

Almost surely, 2^7789669878 is an apocalyptic number.

7789669878 is an abundant number, since it is smaller than the sum of its proper divisors (7792301562).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7789669878 is a wasteful number, since it uses less digits than its factorization.

7789669878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219311.

The product of its digits is 512096256, while the sum is 75.

The square root of 7789669878 is about 88259.1064876594. The cubic root of 7789669878 is about 1982.3165993072.

Subtracting 7789669878 from its reverse (8789669877), we obtain a palindrome (999999999).

The spelling of 7789669878 in words is "seven billion, seven hundred eighty-nine million, six hundred sixty-nine thousand, eight hundred seventy-eight".