57728681527306 has 4 divisors (see below), whose sum is σ = 86593022290962. Its totient is φ = 28864340763652.

The previous prime is 57728681527273. The next prime is 57728681527367. The reversal of 57728681527306 is 60372518682775.

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

It can be written as a sum of positive squares in only one way, i.e., 30435799428225 + 27292882099081 = 5516865^2 + 5224259^2 .

It is a super-2 number, since 2×57728681527306² (a number of 28 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14432170381825 + ... + 14432170381828.

Almost surely, 2^{57728681527306} is an apocalyptic number.

57728681527306 is a deficient number, since it is larger than the sum of its proper divisors (28864340763656).

57728681527306 is a wasteful number, since it uses less digits than its factorization.

57728681527306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28864340763655.

The product of its (nonzero) digits is 237081600, while the sum is 67.

The spelling of 57728681527306 in words is "fifty-seven trillion, seven hundred twenty-eight billion, six hundred eighty-one million, five hundred twenty-seven thousand, three hundred six".