78789898788 has 96 divisors (see below), whose sum is σ = 190181658240. Its totient is φ = 25368837120.

The previous prime is 78789898777. The next prime is 78789898807. The reversal of 78789898788 is 88789898787.

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, 39532320 + ... + 39534312.

It is an arithmetic number, because the mean of its divisors is an integer number (1981058940).

Almost surely, 2^78789898788 is an apocalyptic number.

It is an amenable number.

78789898788 is an abundant number, since it is smaller than the sum of its proper divisors (111391759452).

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

78789898788 is a wasteful number, since it uses less digits than its factorization.

78789898788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2637 (or 2635 counting only the distinct ones).

The product of its digits is 7283146752, while the sum is 87.

Subtracting 78789898788 from its reverse (88789898787), we obtain a palindrome (9999999999).

The spelling of 78789898788 in words is "seventy-eight billion, seven hundred eighty-nine million, eight hundred ninety-eight thousand, seven hundred eighty-eight".