979889863680 has 2112 divisors, whose sum is σ = 4506413184000. Its totient is φ = 195084288000.

The previous prime is 979889863679. The next prime is 979889863697. The reversal of 979889863680 is 86368988979.

979889863680 is a `hidden beast` number, since 97 + 9 + 88 + 98 + 6 + 368 + 0 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 979889863680.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 3903943555 + ... + 3903943805.

Almost surely, 2^979889863680 is an apocalyptic number.

979889863680 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 979889863680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2253206592000).

979889863680 is an abundant number, since it is smaller than the sum of its proper divisors (3526523320320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

979889863680 is a wasteful number, since it uses less digits than its factorization.

979889863680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335 (or 300 counting only the distinct ones).

The product of its (nonzero) digits is 2257403904, while the sum is 81.

The spelling of 979889863680 in words is "nine hundred seventy-nine billion, eight hundred eighty-nine million, eight hundred sixty-three thousand, six hundred eighty".