978486684879 has 64 divisors (see below), whose sum is σ = 1570990878720. Its totient is φ = 534785280000.

The previous prime is 978486684871. The next prime is 978486684949.

978486684879 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 978486684879 - 2³ = 978486684871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978486684871) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1477957 + ... + 2035025.

It is an arithmetic number, because the mean of its divisors is an integer number (24546732480).

Almost surely, 2^978486684879 is an apocalyptic number.

978486684879 is a deficient number, since it is larger than the sum of its proper divisors (592504193841).

978486684879 is a wasteful number, since it uses less digits than its factorization.

978486684879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557232.

The product of its digits is 9364045824, while the sum is 84.

The spelling of 978486684879 in words is "nine hundred seventy-eight billion, four hundred eighty-six million, six hundred eighty-four thousand, eight hundred seventy-nine".