978586685879 has 8 divisors (see below), whose sum is σ = 1074618975360. Its totient is φ = 883732707000.

The previous prime is 978586685861. The next prime is 978586685893.

It is a happy number.

978586685879 is nontrivially palindromic in base 10.

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

It is not a de Polignac number, because 978586685879 - 2²⁰ = 978585637303 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 978586685879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978586685579) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 294575909 + ... + 294579230.

It is an arithmetic number, because the mean of its divisors is an integer number (134327371920).

Almost surely, 2^978586685879 is an apocalyptic number.

978586685879 is a deficient number, since it is larger than the sum of its proper divisors (96032289481).

978586685879 is a wasteful number, since it uses less digits than its factorization.

978586685879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589155301.

The product of its digits is 14631321600, while the sum is 86.

The spelling of 978586685879 in words is "nine hundred seventy-eight billion, five hundred eighty-six million, six hundred eighty-five thousand, eight hundred seventy-nine".