57126561169 has 2 divisors, whose sum is σ = 57126561170. Its totient is φ = 57126561168.

The previous prime is 57126561139. The next prime is 57126561187. The reversal of 57126561169 is 96116562175.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54830905600 + 2295655569 = 234160^2 + 47913^2 .

It is a cyclic number.

It is not a de Polignac number, because 57126561169 - 2⁵ = 57126561137 is a prime.

It is a super-2 number, since 2×57126561169² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (57126561139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28563280584 + 28563280585.

It is an arithmetic number, because the mean of its divisors is an integer number (28563280585).

Almost surely, 2^57126561169 is an apocalyptic number.

It is an amenable number.

57126561169 is a deficient number, since it is larger than the sum of its proper divisors (1).

57126561169 is an equidigital number, since it uses as much as digits as its factorization.

57126561169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 680400, while the sum is 49.

The spelling of 57126561169 in words is "fifty-seven billion, one hundred twenty-six million, five hundred sixty-one thousand, one hundred sixty-nine".