78789898790 has 16 divisors (see below), whose sum is σ = 142015312368. Its totient is φ = 31472960736.

The previous prime is 78789898777. The next prime is 78789898807. The reversal of 78789898790 is 9789898787.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5367152 + ... + 5381811.

It is an arithmetic number, because the mean of its divisors is an integer number (8875957023).

Almost surely, 2^78789898790 is an apocalyptic number.

78789898790 is a deficient number, since it is larger than the sum of its proper divisors (63225413578).

78789898790 is a wasteful number, since it uses less digits than its factorization.

78789898790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10749703.

The product of its (nonzero) digits is 1024192512, while the sum is 80.

It can be divided in two parts, 787898 and 98790, that added together give a palindrome (886688).

The spelling of 78789898790 in words is "seventy-eight billion, seven hundred eighty-nine million, eight hundred ninety-eight thousand, seven hundred ninety".