57540166081 has 2 divisors, whose sum is σ = 57540166082. Its totient is φ = 57540166080.

The previous prime is 57540166007. The next prime is 57540166093. The reversal of 57540166081 is 18066104575.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57508356481 + 31809600 = 239809^2 + 5640^2 .

It is a cyclic number.

It is not a de Polignac number, because 57540166081 - 2¹⁷ = 57540035009 is a prime.

It is a super-2 number, since 2×57540166081² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (57540163081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28770083040 + 28770083041.

It is an arithmetic number, because the mean of its divisors is an integer number (28770083041).

Almost surely, 2^57540166081 is an apocalyptic number.

It is an amenable number.

57540166081 is a deficient number, since it is larger than the sum of its proper divisors (1).

57540166081 is an equidigital number, since it uses as much as digits as its factorization.

57540166081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 201600, while the sum is 43.

The spelling of 57540166081 in words is "fifty-seven billion, five hundred forty million, one hundred sixty-six thousand, eighty-one".