8561942736072 has 128 divisors (see below), whose sum is σ = 23584764764160. Its totient is φ = 2568580152320.

The previous prime is 8561942736059. The next prime is 8561942736073. The reversal of 8561942736072 is 2706372491658.

It is a junction number, because it is equal to n+sod(n) for n = 8561942735997 and 8561942736015.

It is not an unprimeable number, because it can be changed into a prime (8561942736073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25578733 + ... + 25911299.

It is an arithmetic number, because the mean of its divisors is an integer number (184255974720).

It is a 1-persistent number, because it is pandigital, but 2⋅8561942736072 = 17123885472144 is not.

Almost surely, 2^{8561942736072} 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 8561942736072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11792382382080).

8561942736072 is an abundant number, since it is smaller than the sum of its proper divisors (15022822028088).

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

8561942736072 is a wasteful number, since it uses less digits than its factorization.

8561942736072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333563 (or 333559 counting only the distinct ones).

The product of its (nonzero) digits is 30481920, while the sum is 60.

The spelling of 8561942736072 in words is "eight trillion, five hundred sixty-one billion, nine hundred forty-two million, seven hundred thirty-six thousand, seventy-two".