57166538789 has 2 divisors, whose sum is σ = 57166538790. Its totient is φ = 57166538788.

The previous prime is 57166538777. The next prime is 57166538851. The reversal of 57166538789 is 98783566175.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51688022500 + 5478516289 = 227350^2 + 74017^2 .

It is a cyclic number.

It is not a de Polignac number, because 57166538789 - 2¹⁶ = 57166473253 is a prime.

It is a super-2 number, since 2×57166538789² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57166538729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28583269394 + 28583269395.

It is an arithmetic number, because the mean of its divisors is an integer number (28583269395).

Almost surely, 2^57166538789 is an apocalyptic number.

It is an amenable number.

57166538789 is a deficient number, since it is larger than the sum of its proper divisors (1).

57166538789 is an equidigital number, since it uses as much as digits as its factorization.

57166538789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 76204800, while the sum is 65.

The spelling of 57166538789 in words is "fifty-seven billion, one hundred sixty-six million, five hundred thirty-eight thousand, seven hundred eighty-nine".