8638841044668 has 24 divisors (see below), whose sum is σ = 20157343285968. Its totient is φ = 2879606893696.

The previous prime is 8638841044657. The next prime is 8638841044681. The reversal of 8638841044668 is 8664401488368.

It is a junction number, because it is equal to n+sod(n) for n = 8638841044599 and 8638841044608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9701680 + ... + 10554632.

It is an arithmetic number, because the mean of its divisors is an integer number (839889303582).

Almost surely, 2^{8638841044668} is an apocalyptic number.

It is an amenable number.

8638841044668 is an abundant number, since it is smaller than the sum of its proper divisors (11518502241300).

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

8638841044668 is a wasteful number, since it uses less digits than its factorization.

8638841044668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1696973 (or 1696971 counting only the distinct ones).

The product of its (nonzero) digits is 169869312, while the sum is 66.

The spelling of 8638841044668 in words is "eight trillion, six hundred thirty-eight billion, eight hundred forty-one million, forty-four thousand, six hundred sixty-eight".