57821081922 has 90 divisors (see below), whose sum is σ = 133086553353. Its totient is φ = 18142987824.

The previous prime is 57821081917. The next prime is 57821081933. The reversal of 57821081922 is 22918012875.

It can be written as a sum of positive squares in 2 ways, for example, as 55230170121 + 2590911801 = 235011^2 + 50901^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=170031.

It is an unprimeable number.

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 44 ways as a sum of consecutive naturals, for example, 368287068 + ... + 368287224.

Almost surely, 2^57821081922 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57821081922

57821081922 is an abundant number, since it is smaller than the sum of its proper divisors (75265471431).

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

57821081922 is an frugal number, since it uses more digits than its factorization.

57821081922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398 (or 181 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 45.

The spelling of 57821081922 in words is "fifty-seven billion, eight hundred twenty-one million, eighty-one thousand, nine hundred twenty-two".