57065639728 has 40 divisors (see below), whose sum is σ = 114358680576. Its totient is φ = 27557390400.

The previous prime is 57065639723. The next prime is 57065639773. The reversal of 57065639728 is 82793656075.

It is not an unprimeable number, because it can be changed into a prime (57065639723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135123 + ... + 363853.

Almost surely, 2^57065639728 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 57065639728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57179340288).

57065639728 is an abundant number, since it is smaller than the sum of its proper divisors (57293040848).

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

57065639728 is a wasteful number, since it uses less digits than its factorization.

57065639728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229273 (or 229267 counting only the distinct ones).

The product of its (nonzero) digits is 19051200, while the sum is 58.

The spelling of 57065639728 in words is "fifty-seven billion, sixty-five million, six hundred thirty-nine thousand, seven hundred twenty-eight".