8643061812 has 96 divisors (see below), whose sum is σ = 25253867520. Its totient is φ = 2235093120.

The previous prime is 8643061789. The next prime is 8643061813. The reversal of 8643061812 is 2181603468.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8643061813) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 191173 + ... + 232019.

It is an arithmetic number, because the mean of its divisors is an integer number (263061120).

Almost surely, 2^8643061812 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 8643061812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12626933760).

8643061812 is an abundant number, since it is smaller than the sum of its proper divisors (16610805708).

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

8643061812 is a wasteful number, since it uses less digits than its factorization.

8643061812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41101 (or 41099 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 8643061812 is about 92968.0687763277. The cubic root of 8643061812 is about 2052.2134974257.

The spelling of 8643061812 in words is "eight billion, six hundred forty-three million, sixty-one thousand, eight hundred twelve".