979638578880 has 448 divisors, whose sum is σ = 3505128603648. Its totient is φ = 230159646720.

The previous prime is 979638578837. The next prime is 979638578881. The reversal of 979638578880 is 88875836979.

It is a Harshad number since it is a multiple of its sum of digits (78).

It is a junction number, because it is equal to n+sod(n) for n = 979638578796 and 979638578805.

It is not an unprimeable number, because it can be changed into a prime (979638578881) 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, 28224897 + ... + 28259583.

It is an arithmetic number, because the mean of its divisors is an integer number (7823947776).

Almost surely, 2^979638578880 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 979638578880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1752564301824).

979638578880 is an abundant number, since it is smaller than the sum of its proper divisors (2525490024768).

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

979638578880 is a wasteful number, since it uses less digits than its factorization.

979638578880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34824 (or 34814 counting only the distinct ones).

The product of its (nonzero) digits is 1463132160, while the sum is 78.

The spelling of 979638578880 in words is "nine hundred seventy-nine billion, six hundred thirty-eight million, five hundred seventy-eight thousand, eight hundred eighty".