978936639879 has 32 divisors (see below), whose sum is σ = 1438314958080. Its totient is φ = 587294496000.

The previous prime is 978936639833. The next prime is 978936639937.

978936639879 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 978936639879 - 2¹² = 978936635783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978936639479) 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 31 ways as a sum of consecutive naturals, for example, 16832619 + ... + 16890675.

It is an arithmetic number, because the mean of its divisors is an integer number (44947342440).

Almost surely, 2^978936639879 is an apocalyptic number.

978936639879 is a deficient number, since it is larger than the sum of its proper divisors (459378318201).

978936639879 is a wasteful number, since it uses less digits than its factorization.

978936639879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63231.

The product of its digits is 6666395904, while the sum is 84.

The spelling of 978936639879 in words is "nine hundred seventy-eight billion, nine hundred thirty-six million, six hundred thirty-nine thousand, eight hundred seventy-nine".