78084210904779 has 8 divisors (see below), whose sum is σ = 105538476839632. Its totient is φ = 51343042786560.

The previous prime is 78084210904729. The next prime is 78084210904781. The reversal of 78084210904779 is 97740901248087.

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

It is not a de Polignac number, because 78084210904779 - 2⁴⁴ = 60492024860363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78084210904729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178274453902 + ... + 178274454339.

It is an arithmetic number, because the mean of its divisors is an integer number (13192309604954).

Almost surely, 2^{78084210904779} is an apocalyptic number.

78084210904779 is a deficient number, since it is larger than the sum of its proper divisors (27454265934853).

78084210904779 is a wasteful number, since it uses less digits than its factorization.

78084210904779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356548908317.

The product of its (nonzero) digits is 56899584, while the sum is 66.

The spelling of 78084210904779 in words is "seventy-eight trillion, eighty-four billion, two hundred ten million, nine hundred four thousand, seven hundred seventy-nine".