57166728356 has 6 divisors (see below), whose sum is σ = 100041774630. Its totient is φ = 28583364176.

The previous prime is 57166728349. The next prime is 57166728371. The reversal of 57166728356 is 65382766175.

57166728356 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 48671419456 + 8495308900 = 220616^2 + 92170^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7145841041 + ... + 7145841048.

It is an arithmetic number, because the mean of its divisors is an integer number (16673629105).

Almost surely, 2^57166728356 is an apocalyptic number.

It is an amenable number.

57166728356 is a deficient number, since it is larger than the sum of its proper divisors (42875046274).

57166728356 is a wasteful number, since it uses less digits than its factorization.

57166728356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14291682093 (or 14291682091 counting only the distinct ones).

The product of its digits is 12700800, while the sum is 56.

The spelling of 57166728356 in words is "fifty-seven billion, one hundred sixty-six million, seven hundred twenty-eight thousand, three hundred fifty-six".