538867221984 has 576 divisors, whose sum is σ = 2001167400960. Its totient is φ = 133563064320.

The previous prime is 538867221983. The next prime is 538867222039. The reversal of 538867221984 is 489122768835.

538867221984 is a `hidden beast` number, since 5 + 388 + 67 + 2 + 2 + 198 + 4 = 666.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (538867221983) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 63235644 + ... + 63244164.

It is an arithmetic number, because the mean of its divisors is an integer number (3474248960).

Almost surely, 2^538867221984 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 538867221984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1000583700480).

538867221984 is an abundant number, since it is smaller than the sum of its proper divisors (1462300178976).

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

538867221984 is a wasteful number, since it uses less digits than its factorization.

538867221984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8703 (or 8692 counting only the distinct ones).

The product of its digits is 46448640, while the sum is 63.

The spelling of 538867221984 in words is "five hundred thirty-eight billion, eight hundred sixty-seven million, two hundred twenty-one thousand, nine hundred eighty-four".