57843868321 has 4 divisors (see below), whose sum is σ = 59838484500. Its totient is φ = 55849252144.

The previous prime is 57843868297. The next prime is 57843868339. The reversal of 57843868321 is 12386834875.

57843868321 = 170064² + 170065².

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28921764096 + 28922104225 = 170064^2 + 170065^2 .

It is a cyclic number.

It is not a de Polignac number, because 57843868321 - 2⁵ = 57843868289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57843868021) 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 3 ways as a sum of consecutive naturals, for example, 997308046 + ... + 997308103.

It is an arithmetic number, because the mean of its divisors is an integer number (14959621125).

Almost surely, 2^57843868321 is an apocalyptic number.

57843868321 is the 170065-th centered square number.

It is an amenable number.

57843868321 is a deficient number, since it is larger than the sum of its proper divisors (1994616179).

57843868321 is a wasteful number, since it uses less digits than its factorization.

57843868321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1994616178.

The product of its digits is 7741440, while the sum is 55.

The spelling of 57843868321 in words is "fifty-seven billion, eight hundred forty-three million, eight hundred sixty-eight thousand, three hundred twenty-one".