979744856878 has 4 divisors (see below), whose sum is σ = 1469617285320. Its totient is φ = 489872428438.

The previous prime is 979744856869. The next prime is 979744856887. The reversal of 979744856878 is 878658447979.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (979744856869) and next prime (979744856887).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 244936214218 + ... + 244936214221.

It is an arithmetic number, because the mean of its divisors is an integer number (367404321330).

Almost surely, 2^979744856878 is an apocalyptic number.

979744856878 is a deficient number, since it is larger than the sum of its proper divisors (489872428442).

979744856878 is a wasteful number, since it uses less digits than its factorization.

979744856878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489872428441.

The product of its digits is 6827950080, while the sum is 82.

The spelling of 979744856878 in words is "nine hundred seventy-nine billion, seven hundred forty-four million, eight hundred fifty-six thousand, eight hundred seventy-eight".