8556421134768 has 160 divisors (see below), whose sum is σ = 24722464536000. Its totient is φ = 2532807180288.

The previous prime is 8556421134757. The next prime is 8556421134827. The reversal of 8556421134768 is 8674311246558.

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, 27193 + ... + 4136856.

It is an arithmetic number, because the mean of its divisors is an integer number (154515403350).

Almost surely, 2^{8556421134768} 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 8556421134768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12361232268000).

8556421134768 is an abundant number, since it is smaller than the sum of its proper divisors (16166043401232).

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

8556421134768 is a wasteful number, since it uses less digits than its factorization.

8556421134768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4164199 (or 4164193 counting only the distinct ones).

The product of its digits is 38707200, while the sum is 60.

The spelling of 8556421134768 in words is "eight trillion, five hundred fifty-six billion, four hundred twenty-one million, one hundred thirty-four thousand, seven hundred sixty-eight".