538684881328 has 60 divisors (see below), whose sum is σ = 1148906934000. Its totient is φ = 244494490240.

The previous prime is 538684881323. The next prime is 538684881379. The reversal of 538684881328 is 823188486835.

It is a super-2 number, since 2×538684881328² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (64) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 538684881328.

It is not an unprimeable number, because it can be changed into a prime (538684881323) 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 11 ways as a sum of consecutive naturals, for example, 1105173 + ... + 1516171.

It is an arithmetic number, because the mean of its divisors is an integer number (19148448900).

Almost surely, 2^538684881328 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 538684881328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (574453467000).

538684881328 is an abundant number, since it is smaller than the sum of its proper divisors (610222052672).

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

538684881328 is a wasteful number, since it uses less digits than its factorization.

538684881328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411706 (or 411689 counting only the distinct ones).

The product of its digits is 70778880, while the sum is 64.

The spelling of 538684881328 in words is "five hundred thirty-eight billion, six hundred eighty-four million, eight hundred eighty-one thousand, three hundred twenty-eight".