52191818784 has 144 divisors (see below), whose sum is σ = 170747740800. Its totient is φ = 14813107200.

The previous prime is 52191818771. The next prime is 52191818821. The reversal of 52191818784 is 48781819125.

52191818784 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (144).

It is a self number, because there is not a number n which added to its sum of digits gives 52191818784.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 218692 + ... + 390140.

It is an arithmetic number, because the mean of its divisors is an integer number (1185748200).

Almost surely, 2^52191818784 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 52191818784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85373870400).

52191818784 is an abundant number, since it is smaller than the sum of its proper divisors (118555922016).

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

52191818784 is a wasteful number, since it uses less digits than its factorization.

52191818784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171623 (or 171612 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 54.

The spelling of 52191818784 in words is "fifty-two billion, one hundred ninety-one million, eight hundred eighteen thousand, seven hundred eighty-four".