8142866386578 has 192 divisors, whose sum is σ = 22596581539584. Its totient is φ = 2075121734400.

The previous prime is 8142866386561. The next prime is 8142866386643. The reversal of 8142866386578 is 8756836682418.

8142866386578 is a `hidden beast` number, since 8 + 1 + 42 + 8 + 6 + 6 + 3 + 8 + 6 + 578 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 8430358 + ... + 9346478.

It is an arithmetic number, because the mean of its divisors is an integer number (117690528852).

Almost surely, 2^{8142866386578} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8142866386578, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11298290769792).

8142866386578 is an abundant number, since it is smaller than the sum of its proper divisors (14453715153006).

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

8142866386578 is a wasteful number, since it uses less digits than its factorization.

8142866386578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 916222 (or 916197 counting only the distinct ones).

The product of its digits is 743178240, while the sum is 72.

The spelling of 8142866386578 in words is "eight trillion, one hundred forty-two billion, eight hundred sixty-six million, three hundred eighty-six thousand, five hundred seventy-eight".