8111918950578 has 160 divisors (see below), whose sum is σ = 19973674828800. Its totient is φ = 2449249713504.

The previous prime is 8111918950543. The next prime is 8111918950579. The reversal of 8111918950578 is 8750598191118.

8111918950578 is a `hidden beast` number, since 8 + 1 + 1 + 1 + 9 + 1 + 8 + 9 + 50 + 578 = 666.

It is not an unprimeable number, because it can be changed into a prime (8111918950579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 177174493 + ... + 177220271.

It is an arithmetic number, because the mean of its divisors is an integer number (124835467680).

Almost surely, 2^{8111918950578} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8111918950578, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9986837414400).

8111918950578 is an abundant number, since it is smaller than the sum of its proper divisors (11861755878222).

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

8111918950578 is a wasteful number, since it uses less digits than its factorization.

8111918950578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48338 (or 48329 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 63.

The spelling of 8111918950578 in words is "eight trillion, one hundred eleven billion, nine hundred eighteen million, nine hundred fifty thousand, five hundred seventy-eight".