78888888888887 has 24 divisors (see below), whose sum is σ = 100403187219072. Its totient is φ = 61471861327800.

The previous prime is 78888888888877. The next prime is 78888888888917.

78888888888887 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 78888888888887 - 2¹² = 78888888884791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78888888888877) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 213170189 + ... + 213539942.

It is an arithmetic number, because the mean of its divisors is an integer number (4183466134128).

Almost surely, 2^{78888888888887} is an apocalyptic number.

78888888888887 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

78888888888887 is a deficient number, since it is larger than the sum of its proper divisors (21514298330185).

78888888888887 is an frugal number, since it uses more digits than its factorization.

78888888888887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426710177 (or 426710149 counting only the distinct ones).

The product of its digits is 3367254360064, while the sum is 110.

The spelling of 78888888888887 in words is "seventy-eight trillion, eight hundred eighty-eight billion, eight hundred eighty-eight million, eight hundred eighty-eight thousand, eight hundred eighty-seven".