78789898789 has 8 divisors (see below), whose sum is σ = 91185416960. Its totient is φ = 66679335216.

The previous prime is 78789898777. The next prime is 78789898807. The reversal of 78789898789 is 98789898787.

78789898789 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78789898789 - 2⁵ = 78789898757 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78789898489) by changing a digit.

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, 71238054 + ... + 71239159.

It is an arithmetic number, because the mean of its divisors is an integer number (11398177120).

Almost surely, 2^78789898789 is an apocalyptic number.

78789898789 is a gapful number since it is divisible by the number (79) formed by its first and last digit.

It is an amenable number.

78789898789 is a deficient number, since it is larger than the sum of its proper divisors (12395518171).

78789898789 is a wasteful number, since it uses less digits than its factorization.

78789898789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142477299.

The product of its digits is 8193540096, while the sum is 88.

The spelling of 78789898789 in words is "seventy-eight billion, seven hundred eighty-nine million, eight hundred ninety-eight thousand, seven hundred eighty-nine".