57728163044 has 6 divisors (see below), whose sum is σ = 101024285334. Its totient is φ = 28864081520.

The previous prime is 57728163043. The next prime is 57728163067. The reversal of 57728163044 is 44036182775.

It can be written as a sum of positive squares in only one way, i.e., 56983418944 + 744744100 = 238712^2 + 27290^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 57728163044.

It is not an unprimeable number, because it can be changed into a prime (57728163043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7216020377 + ... + 7216020384.

It is an arithmetic number, because the mean of its divisors is an integer number (16837380889).

Almost surely, 2^57728163044 is an apocalyptic number.

It is an amenable number.

57728163044 is a deficient number, since it is larger than the sum of its proper divisors (43296122290).

57728163044 is a wasteful number, since it uses less digits than its factorization.

57728163044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14432040765 (or 14432040763 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 47.

The spelling of 57728163044 in words is "fifty-seven billion, seven hundred twenty-eight million, one hundred sixty-three thousand, forty-four".