979509381420 has 192 divisors, whose sum is σ = 2926826090496. Its totient is φ = 244350812160.

The previous prime is 979509381401. The next prime is 979509381449. The reversal of 979509381420 is 24183905979.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7694932 + ... + 7821188.

It is an arithmetic number, because the mean of its divisors is an integer number (15243885888).

Almost surely, 2^979509381420 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 979509381420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1463413045248).

979509381420 is an abundant number, since it is smaller than the sum of its proper divisors (1947316709076).

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

979509381420 is a wasteful number, since it uses less digits than its factorization.

979509381420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126440 (or 126438 counting only the distinct ones).

The product of its (nonzero) digits is 4898880, while the sum is 57.

The spelling of 979509381420 in words is "nine hundred seventy-nine billion, five hundred nine million, three hundred eighty-one thousand, four hundred twenty".