57556665577 has 2 divisors, whose sum is σ = 57556665578. Its totient is φ = 57556665576.

The previous prime is 57556665571. The next prime is 57556665589. The reversal of 57556665577 is 77556665575.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39653155161 + 17903510416 = 199131^2 + 133804^2 .

It is a cyclic number.

It is not a de Polignac number, because 57556665577 - 2³¹ = 55409181929 is a prime.

It is not a weakly prime, because it can be changed into another prime (57556665571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28778332788 + 28778332789.

It is an arithmetic number, because the mean of its divisors is an integer number (28778332789).

Almost surely, 2^57556665577 is an apocalyptic number.

It is an amenable number.

57556665577 is a deficient number, since it is larger than the sum of its proper divisors (1).

57556665577 is an equidigital number, since it uses as much as digits as its factorization.

57556665577 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 231525000, while the sum is 64.

The spelling of 57556665577 in words is "fifty-seven billion, five hundred fifty-six million, six hundred sixty-five thousand, five hundred seventy-seven".