8979749856 has 576 divisors, whose sum is σ = 33888637440. Its totient is φ = 2246952960.

The previous prime is 8979749837. The next prime is 8979749897. The reversal of 8979749856 is 6589479798.

8979749856 is a `hidden beast` number, since 89 + 7 + 9 + 7 + 498 + 56 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

Its product of digits (274337280) is a multiple of the sum of its prime factors (196).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 123010236 + ... + 123010308.

It is an arithmetic number, because the mean of its divisors is an integer number (58834440).

Almost surely, 2^8979749856 is an apocalyptic number.

8979749856 is a gapful number since it is divisible by the number (86) 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 8979749856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16944318720).

8979749856 is an abundant number, since it is smaller than the sum of its proper divisors (24908887584).

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

8979749856 is a wasteful number, since it uses less digits than its factorization.

8979749856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196 (or 139 counting only the distinct ones).

The product of its digits is 274337280, while the sum is 72.

The square root of 8979749856 is about 94761.5420727206. The cubic root of 8979749856 is about 2078.5225775623.

The spelling of 8979749856 in words is "eight billion, nine hundred seventy-nine million, seven hundred forty-nine thousand, eight hundred fifty-six".