557821182438 has 256 divisors, whose sum is σ = 1445960678400. Its totient is φ = 157906298880.

The previous prime is 557821182377. The next prime is 557821182439. The reversal of 557821182438 is 834281128755.

It is a happy number.

557821182438 is a `hidden beast` number, since 5 + 5 + 7 + 8 + 21 + 182 + 438 = 666.

It is a super-2 number, since 2×557821182438² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (557821182439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 434778145 + ... + 434779427.

It is an arithmetic number, because the mean of its divisors is an integer number (5648283900).

Almost surely, 2^557821182438 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 557821182438, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (722980339200).

557821182438 is an abundant number, since it is smaller than the sum of its proper divisors (888139495962).

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

557821182438 is a wasteful number, since it uses less digits than its factorization.

557821182438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2244 (or 2238 counting only the distinct ones).

The product of its digits is 4300800, while the sum is 54.

The spelling of 557821182438 in words is "five hundred fifty-seven billion, eight hundred twenty-one million, one hundred eighty-two thousand, four hundred thirty-eight".