8636543980 has 96 divisors (see below), whose sum is σ = 19130126400. Its totient is φ = 3271876608.

The previous prime is 8636543977. The next prime is 8636544013. The reversal of 8636543980 is 893456368.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4055556 + ... + 4057684.

It is an arithmetic number, because the mean of its divisors is an integer number (199272150).

Almost surely, 2^8636543980 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 8636543980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9565063200).

8636543980 is an abundant number, since it is smaller than the sum of its proper divisors (10493582420).

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

8636543980 is a wasteful number, since it uses less digits than its factorization.

8636543980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2323 (or 2321 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 52.

The square root of 8636543980 is about 92933.0080219079. The cubic root of 8636543980 is about 2051.6975017892.

The spelling of 8636543980 in words is "eight billion, six hundred thirty-six million, five hundred forty-three thousand, nine hundred eighty".