8991279180 has 192 divisors, whose sum is σ = 31710604800. Its totient is φ = 2096720640.

The previous prime is 8991279151. The next prime is 8991279203. The reversal of 8991279180 is 819721998.

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 99675 + ... + 167085.

It is an arithmetic number, because the mean of its divisors is an integer number (165159400).

Almost surely, 2^8991279180 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 8991279180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15855302400).

8991279180 is an abundant number, since it is smaller than the sum of its proper divisors (22719325620).

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

8991279180 is a wasteful number, since it uses less digits than its factorization.

8991279180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67461 (or 67453 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 54.

The square root of 8991279180 is about 94822.3559082983. The cubic root of 8991279180 is about 2079.4117527233.

The spelling of 8991279180 in words is "eight billion, nine hundred ninety-one million, two hundred seventy-nine thousand, one hundred eighty".